CN211747705U

CN211747705U - Hand-operated lifting table frame and table

Info

Publication number: CN211747705U
Application number: CN201922115556.6U
Authority: CN
Inventors: 孟庆玉
Original assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Current assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-10-27
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a hand-operated lifting table frame and a table, which belong to the technical field of tables, the utility model discloses a hand-operated lifting table frame, which comprises a crossbeam, a mounting side plate and lifting columns arranged at two ends of the crossbeam, wherein the lifting columns comprise a transmission mechanism which comprises a screw rod, the lifting table frame also comprises a lifting adjusting mechanism for realizing lifting of the lifting columns by hand, the lifting adjusting mechanism comprises a hand crank component and a connecting rod in transmission connection with the hand crank component, the connecting rod is in transmission connection with the screw rods at two ends, a first self-locking torsion spring is arranged on the hand crank component, a second self-locking torsion spring is arranged on the screw rod, the controllability of height and speed is strong, the safety is high, the applicability is stronger especially for minors with poor safety consciousness and old people with slow reaction speed, the triple self-locking effect is good, the firmness is high, the self-locking is difficult to be damaged by, the lift stand can be stabilized in set high department during normal use, and stability is high, and the practicality is strong.

Description

Hand-operated lifting table frame and table

[ technical field ] A method for producing a semiconductor device

The utility model relates to a desk technical field, concretely relates to hand lift table frame and desk.

[ background of the invention ]

The table is common furniture, articles can be placed on the table, dining, writing or working can be performed on the table, the table is rich and various in types in order to meet the requirements of the public, such as an office table, a dining table, a desk, a computer table and the like, the traditional table is horizontally fixed and cannot be adjusted according to the personal conditions and requirements of users, the table needs to be stooped down and stooped when being used for learning and working, diseases such as vertebra, waist and back are easily caused after being used for a long time, myopia and the like can be caused, various height-adjustable lifting tables appear on the market aiming at the conditions, the height change of the lifting table is generally realized by adjusting the table legs, the lifting upright columns are used as the table legs at present most commonly, the lifting upright columns are driven by electric drive and manual drive, the manual drive is a common lifting table manual drive mode, compared with the electric drive, the manual drive is energy-saving and, the cost is lower, controls lift height and speed more easily, and the in-process meets the situation and can stops at any time, and the security is high, but the hand lift table auto-lock performance of using at present is poor, rises to suitable high back, and desktop self and the weight of holding article can give stand pressure in the use, makes the stand compress downwards, hardly keeps in suitable position department, poor stability.

[ summary of the invention ]

The utility model aims to solve the technical problem that the prior art is not enough to be overcome, and a hand-operated lifting table frame with strong self-locking capability and high stability is designed.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a hand lift table frame, includes crossbeam, installation curb plate and establishes the lift stand at the crossbeam both ends, including drive mechanism in the lift stand, drive mechanism includes the lead screw, still include the lift adjustment mechanism who realizes the lift stand through hand on the lift table frame, lift adjustment mechanism includes the crank subassembly and the connecting rod of being connected with the crank subassembly transmission, the connecting rod is connected with both ends lead screw transmission simultaneously, be equipped with first auto-lock torsional spring on the crank subassembly, be equipped with second auto-lock torsional spring on the lead screw.

Preferably, the hand crank assembly is in gear-meshing transmission connection with the connecting rod.

Preferably, the hand crank assembly comprises a hand crank body, the hand crank body comprises a hand holding part, a plug and a connecting handle for connecting the hand holding part with the plug, a first gear is arranged on the plug, and a second gear vertically meshed with the first gear is sleeved on the connecting rod.

As preferred, the transmission junction of crank subassembly and connecting rod still is equipped with the first installation shell of fixing on the crossbeam, first gear and second gear are established in first installation shell, be equipped with the bearing between first gear and the first installation shell, the inner circle and the first gear clearance fit of bearing, bearing inner race and first installation shell interference fit, be equipped with the bearing between second gear and the first installation shell, the inner circle and the second gear clearance fit of bearing, bearing inner race and first installation shell interference fit.

Preferably, the plug is sleeved with a first shaft sleeve, the first self-locking torsion spring is sleeved outside the first shaft sleeve, one end of the first self-locking torsion spring is provided with a small hook, and a clamping groove for clamping the small hook is formed in the first mounting shell.

Preferably, the hand crank assembly further comprises a mounting block fixed on the bottom side of the desktop, a through hole for a plug to pass through is formed in the mounting block, and the plug can rotate in the through hole.

Preferably, the connecting rod is engaged with a screw gear.

Preferably, the end part of the connecting rod is provided with a third gear, and the top end of the screw rod is provided with a fourth gear vertically meshed with the third gear.

Preferably, the transmission junction of connecting rod and lead screw still is equipped with the second installation shell of fixing on the lift stand, third gear and fourth gear are established in the second installation shell, be equipped with the bearing between third gear and the second installation shell, the inner circle and the third gear clearance fit of bearing, bearing inner race and second installation shell interference fit, be equipped with the bearing between fourth gear and the second installation shell, the inner circle and the fourth gear clearance fit of bearing, bearing inner race and second installation shell interference fit.

Adopt utility model's beneficial effect:

1. when going up and down to the table frame in this scheme, wave hand crank subassembly, make hand crank subassembly's rotation drive connecting rod rotation, screw rod rotation in through connecting rod drive lift stand, accomplish the lift of lift stand then, the height and the fast controllability of stand lift are strong, and the security is high, and is stronger to the former person that the security consciousness is relatively poor and the slow old person suitability of reaction speed especially, the concrete constitution and the theory of operation of lift stand have been published in this patent owner's other patents in this scheme, can refer to application number 201720389490.8, the name is a telescopic transmission assembly device and the patent literature of lift stand, but do not confine the stand in this document to, no longer the repeated description one by one here.

2. When the lifting upright post ascends, the rotating direction of the hand crank assembly is opposite to the rotating direction of the first self-locking torsion spring, the first self-locking torsion spring is in a natural state and cannot block the rotating of the hand crank assembly, when the lifting upright post ascends to a proper position, the table top and articles on the table top apply pressure to the lifting upright post to enable the lifting upright post to have a descending trend when the lifting table is used, the hand crank assembly has a reverse trend, the reverse direction is the same as the rotating direction of the first self-locking torsion spring, the friction force between the hand crank assembly and the inner ring of the first self-locking torsion spring enables the first self-locking torsion spring to rotate along with the hand crank assembly along with the rotating direction of the first self-locking torsion spring, and the torsion springs are screwed more and more tightly, so that the hand crank assembly is tightly held; the principle that the lead screw realized the auto-lock through the second auto-lock torsional spring is similar with hand crank subassembly auto-lock principle, no longer gives unnecessary details here one by one, through the first auto-lock torsional spring on the hand crank subassembly and the second auto-lock torsional spring on the lead screw of both ends, triple auto-lock, locking is effectual, and the firmness is high, and non-artificial great external force is difficult to destroy the auto-lock, and the lift stand can be stabilized in set high department during normal use, and stability is high, and the practicality is strong.

The utility model discloses a another technical scheme as follows:

a hand-operated lifting table comprises a table top, wherein a hand-operated lifting table frame in any technical scheme is arranged below the table top.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The utility model is further described with the following drawings:

fig. 1 is a schematic view of the three-dimensional structure of the hand-operated lifting table frame of the utility model.

Fig. 2 is the perspective structure diagram of the utility model after the upright on one side of the hand-operated lifting table frame is removed and the sleeve is exposed out of the screw rod.

Fig. 3 is a rear elevational view of fig. 2 with the second mounting shell removed.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is the utility model discloses hand crank subassembly and the local enlarger of connecting rod gear engagement transmission connecting portion.

Fig. 6 is a schematic view of the three-dimensional structure of the crank assembly of the present invention.

Fig. 7 is a schematic view of the three-dimensional structure of the self-locking torsion spring of the present invention.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, those skilled in the art can obtain other embodiments without creative efforts, and all of them belong to the protection scope of the utility model.

In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc., which indicate orientations or positional relationships, are used for convenience in describing embodiments and simplifying descriptions, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

The first embodiment is as follows:

as shown in fig. 1 to 7, a hand lift table frame, include crossbeam 001, installation curb plate 005 and establish the lift stand 002 at crossbeam 001 both ends, the bottom of lift post is equipped with lower margin 003, through lower margin 003 with the firm subaerial placing of whole table frame, including drive mechanism in the lift stand 002, drive mechanism includes lead screw 3, still include the lifting adjusting mechanism 004 that realizes the lift stand 002 lift through hand on the lift table frame, lifting adjusting mechanism 004 includes hand subassembly 1 and the connecting rod 2 of being connected with hand subassembly 1 transmission, connecting rod 2 is connected with both ends lead screw 3 transmission simultaneously, be equipped with first auto-lock torsional spring 4 on the hand subassembly 1, be equipped with second auto-lock torsional spring 5 on the lead screw 3.

When going up and down to the table frame in this embodiment, wave hand crank subassembly 1, make hand crank subassembly 1's rotation drive connecting rod 2 rotation, 3 rotations of lead screw in through connecting rod 2 drive lift stand 002, accomplish the lift of lift stand 002 then, the controllability of the height and the speed that the stand goes up and down is strong, and the security is high, and is stronger to the relatively poor young of safety consciousness and the slower old person suitability of reaction speed especially, the concrete constitution and the theory of operation of lift stand 002 have been published in this patent other patents of patentee in this embodiment, no longer give unnecessary details one by one here. When the lifting upright column 002 rises, the rotating direction of the hand crank assembly 1 is opposite to the rotating direction of the first self-locking torsion spring 4, the first self-locking torsion spring 4 is in a natural state in the rotating process of the hand crank assembly 1 and cannot obstruct the rotating of the hand crank assembly 1, when the lifting upright column 002 rises to a proper position, the lifting upright column 002 is pressed by a tabletop and articles on the tabletop to have a descending trend in the process of using the lifting table, the hand crank assembly 1 has a reverse trend, the reverse direction is the same as the rotating direction of the first self-locking torsion spring 4, the friction force of the inner rings of the hand crank assembly 1 and the first self-locking torsion spring 4 enables the first self-locking torsion spring 4 to rotate along the first self-locking torsion spring 4 along with the hand crank assembly 1, and the torsion springs are screwed more tightly, so that the hand crank assembly 1 is held tightly, and the self-locking of; the principle that lead screw 3 realized the auto-lock through second auto-lock torsional spring 5 is similar with hand crank subassembly 1 auto-lock principle, no longer gives unnecessary details one by one here, through first auto-lock torsional spring 4 on the hand crank subassembly 1 and second auto-lock torsional spring 5 on the both ends lead screw 3, triple auto-lock, locking is effectual, and the firmness is high, and the non-artificial great external force is difficult to destroy the auto-lock, and lift stand 002 can be stabilized in set high department during normal use, and stability is high, and the practicality is strong.

The rotating direction of the hand crank assembly 1 is different from the rotating center of the connecting rod 2, and the direction needs to be changed while the components are transmitted, as shown in figure 5, therefore, in the present embodiment, the hand crank assembly 1 is in gear-meshing transmission connection with the connecting rod 2, as shown in fig. 6, the hand crank assembly 1 includes a hand crank body 101, the hand crank body 101 includes a hand grip portion 101a, a plug 101b and a connecting handle 101c connecting the hand grip portion 101a and the plug 101b, the hand crank body 101 and the connecting rod 2 are in gear-meshing structure that the plug 101b is provided with a first gear 102, as shown in fig. 5, the connecting rod 2 is sleeved with a second gear 201 vertically engaged with the first gear 102, the gear meshing mode has the advantages of compact structure, small occupied space, reduced volume of the whole connecting structure, high transmission efficiency, accurate transmission ratio, long service life and no need of frequent disassembly, maintenance and replacement. If the hand crank body 101 is far away from the connecting rod 2 and the length of the plug is not enough, the plug 101b can be connected with a transmission shaft through a coupler, and the first gear 102 is arranged on the transmission shaft.

The cross rod in the embodiment can be a telescopic push rod, and when the cross rod is stretched, if the length of the connecting rod 2 is insufficient, the connecting rod is not enough to be connected with the screw rods 3 at the two ends, the cross rod can be also connected with another connecting rod through the coupler.

In order to facilitate the fixation of the gear transmission connection part, as shown in fig. 2, the transmission connection part of the hand crank assembly 1 and the connecting rod 2 is further provided with a first mounting shell 6 fixed on the cross beam 001, the first gear 102 and the second gear 201 are arranged in the first mounting shell 6, as shown in fig. 5, a bearing 7 is arranged between the first gear 102 and the first mounting shell 6, the inner ring of the bearing 7 is in clearance fit with the first gear 102, the outer ring of the bearing 7 is in interference fit with the first mounting shell 6, the bearing 7 is arranged between the second gear 201 and the first mounting shell 6, the inner ring of the bearing 7 is in clearance fit with the second gear 201, the outer ring of the bearing 7 is in interference fit with the first mounting shell 6, the first gear 102 and the second gear 201 can rotate more smoothly by arranging the bearing 7, the direct friction between the first gear 102 and the second gear 201 and the first mounting shell 6 is avoided, the abrasion is slowed down, and the replacement cost is, the service life is prolonged.

In order to avoid direct friction between the plug 101b and the first self-locking torsion spring 4 and damage the plug 101b and the first self-locking torsion spring 4, as shown in fig. 5 and 6, the plug 101b is sleeved with a first shaft sleeve 103, the first self-locking torsion spring 4 is sleeved outside the first shaft sleeve 103, an inner ring of the first shaft sleeve 103 is matched with the plug 101b in shape and rotates consistently without relative rotation, if the plug 101b is a hexagonal plug 101b, the section of the inner ring of the first shaft sleeve 103 is also hexagonal, as shown in fig. 7, one end of the first self-locking torsion spring 4 is provided with a small hook 401, and a clamping groove for clamping the small hook 401 is arranged in the first mounting shell 6, so that one end of the first self-locking torsion spring 4 is a fixed end and the other end is a free end, and when the plug 101b rotates reversely, the free end rotates together with the first shaft sleeve 103 due to gradually rotate along the rotation direction thereof.

As shown in fig. 6, hand subassembly 1 is still including fixing the installation piece 104 in the desktop bottom side, be equipped with the through-hole that supplies plug 101b to pass on the installation piece 104, plug 101b can rotate in the through-hole, fix hand subassembly 1's one end on crossbeam 001 through first installation shell 6, the setting of installation piece 104, also inject hand subassembly 1's the other end in a position department of desktop below, make hand subassembly 1 only can along the center pin rotation, can not rock from top to bottom about, it is more smooth when making the hand shake, it is better to feel, the driven stability and the accuracy of hand subassembly 1 have been improved, thereby whole hand stability of rising price table frame has been improved.

In this embodiment, the rotation center of the connecting rod 2 is different from the rotation center of the screw rod 3, and the direction of the two components needs to be changed while the two components are in transmission, as shown in fig. 4, so that the connecting rod 2 and the screw rod 3 are also in gear engagement transmission connection, the specific structure of the gear engagement is that the end of the connecting rod 2 is provided with a third gear 202, the top end of the screw rod 3 is provided with a fourth gear 301 vertically engaged with the third gear 202, in order to facilitate the fixation of the gear engagement transmission connection part, as shown in fig. 2, the transmission connection part of the connecting rod 2 and the screw rod 3 is further provided with a second mounting shell 8 fixed on the lifting upright column 002, the third gear 202 and the fourth gear 301 are arranged in the second mounting shell 8, a bearing 7 is arranged between the third gear 202 and the second mounting shell 8, the inner ring of the bearing 7 is in clearance fit with the third gear 202, the outer ring of the bearing 7 is in interference fit with the second mounting shell 8, bearing 7's inner circle and fourth gear 301 clearance fit, bearing 7 outer lane and 8 interference fit of second installation shell, through setting up bearing 7, make third gear 202 and fourth gear 301 rotating more smoothly, avoid third gear 202 and fourth gear 301 and second installation shell 8 directly to produce the friction, slow down wearing and tearing, reduce replacement cost, increase of service life.

Example two:

a hand-operated lifting table comprises a table top, wherein a hand-operated lifting table frame in the technical scheme of the embodiment is arranged below the table top.

The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides a hand lift table frame, includes crossbeam, installation curb plate and establishes the lift stand at the crossbeam both ends, including drive mechanism in the lift stand, drive mechanism includes the lead screw, its characterized in that, still include the lift adjustment mechanism who realizes the lift stand through hand on the lift table frame, lift adjustment mechanism includes the crank subassembly and the connecting rod of being connected with the crank subassembly transmission, the connecting rod is connected with both ends lead screw transmission simultaneously, be equipped with first auto-lock torsional spring on the crank subassembly, be equipped with second auto-lock torsional spring on the lead screw.

2. A hand-operated lifting table frame as claimed in claim 1, wherein the hand crank assembly is in geared connection with a connecting rod gear.

3. The hand-operated lifting table frame as claimed in claim 2, wherein the hand-operated handle assembly comprises a hand-operated handle body, the hand-operated handle body comprises a hand-held portion, a plug and a connecting handle for connecting the hand-held portion and the plug, a first gear is arranged on the plug, and a second gear vertically meshed with the first gear is sleeved on the connecting rod.

4. The hand-cranking lifting table frame as claimed in claim 3, wherein a first mounting shell fixed on the cross beam is further arranged at the transmission connection position of the hand crank assembly and the connecting rod, the first gear and the second gear are arranged in the first mounting shell, a bearing is arranged between the first gear and the first mounting shell, an inner ring of the bearing is in clearance fit with the first gear, an outer ring of the bearing is in interference fit with the first mounting shell, a bearing is arranged between the second gear and the first mounting shell, an inner ring of the bearing is in clearance fit with the second gear, and an outer ring of the bearing is in interference fit with the first mounting shell.

5. The hand-operated lifting table frame as claimed in claim 4, wherein the plug is sleeved with a first shaft sleeve, the first self-locking torsion spring is sleeved outside the first shaft sleeve, a small hook is arranged at one end of the first self-locking torsion spring, and a clamping groove for clamping the small hook is arranged in the first mounting shell.

6. A hand-operated lifting table frame as claimed in any one of claims 3 to 5, wherein the hand crank assembly further comprises a mounting block fixed to the underside of the table top, the mounting block being provided with a through hole for a plug to pass through, the plug being rotatable in the through hole.

7. A hand-cranking lifting table frame as claimed in claim 1, wherein the connecting rod is meshed with a lead screw gear.

8. A hand-operated lifting table frame as claimed in claim 7, wherein the end of the connecting rod is provided with a third gear, and the top end of the screw rod is provided with a fourth gear vertically meshed with the third gear.

9. The hand-cranking lifting table frame as claimed in claim 8, wherein a second mounting shell fixed on the lifting column is further arranged at the transmission connection position of the connecting rod and the lead screw, the third gear and the fourth gear are arranged in the second mounting shell, a bearing is arranged between the third gear and the second mounting shell, an inner ring of the bearing is in clearance fit with the third gear, an outer ring of the bearing is in interference fit with the second mounting shell, a bearing is arranged between the fourth gear and the second mounting shell, an inner ring of the bearing is in clearance fit with the fourth gear, and an outer ring of the bearing is in interference fit with the second mounting shell.

10. A hand-operated lifting table, which comprises a table top, and is characterized in that a hand-operated lifting table frame as claimed in any one of claims 1 to 9 is arranged below the table top.