CN215303768U - Lifting table leg - Google Patents

Abstract

The utility model discloses a lifting table leg which comprises an inner tube, an outer tube and a lifting push rod, wherein the outer tube is sleeved on the inner tube; the lower part of the inner wall of the inner pipe is symmetrically provided with anti-rotation sliding blocks, the lifting push rod comprises a push rod shell, and the anti-rotation sliding blocks are in sliding fit with a pair of opposite surfaces of the push rod shell; one of the anti-rotation sliding block and the push rod shell is provided with a vertical sliding groove, the other of the anti-rotation sliding block and the push rod shell is provided with a convex block, and the convex block is inserted in the sliding groove and is in relative sliding connection with the sliding groove; the lug and the sliding groove are configured to enable the anti-rotation sliding block to be in sliding connection with the lifting push rod and the anti-rotation sliding block and the lifting push rod to be relatively fixed along the circumferential direction; compared with the prior art, the inner tube and the lifting push rod in the lifting table leg are circumferentially fixed, and the lifting push rod and the outer tube are circumferentially fixed at the same time, so that the rotation prevention of the inner tube and the outer tube and the rotation prevention of the screw nut are finally realized, and the lifting table leg can be normally lifted.

Description

Lifting table leg

Technical Field

The utility model relates to the field of lifting tables, in particular to a lifting table leg.

Background

For the desk accompanying people for a long time, the office desk and the learning desk which are beneficial to the health of people are more and more popular choices; compared with the traditional desk with the fixed desktop, the lifting desk with the height-adjustable desktop has the advantages that when a user feels tired after sitting for a long time, the height of the lifting desk can be adjusted, the user stands for work, discomfort caused by sitting for a long time can be relieved, and meanwhile, the health problem caused by sitting for a long time on a human body can be avoided in the long-distance direction; for the upright post of the lifting table, the round tubular upright post is more beautiful and more solid visually, but because the two round tubes are not limited circumferentially naturally, the inner tube and the outer tube of the upright post may rotate relatively; moreover, the electric push rod in the circular tube can also rotate due to no circumferential limit, and the lifting function cannot be realized.

CN201921146101.4, a chinese utility model patent discloses a middle tube connector applied in a lifting table leg, the lifting table leg comprises an inner tube, a middle tube, an outer tube and a screw rod assembly arranged in the inner tube, which are nested from inside to outside in sequence; the middle pipe connecting piece is of an integral cylindrical structure and comprises an upper part embedded in the outer pipe and a lower part connected to the lower end of the middle pipe, wherein the upper part can linearly move, the diameter of the upper part is larger than that of the lower part, and the middle pipe connecting piece is also longitudinally provided with a through groove for penetrating through the screw rod assembly; the periphery of the upper part is also provided with a flange structure matched with the inner tooth socket structure on the inner side wall of the outer pipe, and the shape of the through groove is matched with the peripheral structure of the screw rod assembly. The utility model discloses a well rotation-proof between the sleeve pipe is realized with the recess cooperation of sand grip on the friction disc and outer tube inner wall, realizes preventing rotating between lead screw subassembly and the sleeve pipe through cylindric structure, need do two settings, and the assembly is troublesome and the cost is higher.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the lifting table leg which can realize an anti-rotation function, is quick to assemble, has a small contact surface of an anti-rotation structure and ensures smooth sliding during lifting.

The technical scheme of the utility model is realized as follows:

a lifting table leg comprises an inner tube, an outer tube and a lifting push rod, wherein the outer tube is sleeved on the inner tube, the lifting push rod is arranged in the inner tube and the outer tube and is vertically arranged at the bottom of the outer tube, and the lifting push rod is configured to drive the inner tube and the outer tube to move relatively in the axial direction; the lower part of the inner pipe is symmetrically provided with anti-rotation sliding blocks fixed on the inner wall of the inner pipe, the lifting push rod comprises a push rod shell, and the anti-rotation sliding blocks are in sliding fit with a pair of opposite surfaces of the push rod shell; one of the anti-rotation sliding block and the push rod shell is provided with a vertical sliding groove, the other of the anti-rotation sliding block and the push rod shell is provided with a convex block, and the convex block is inserted in the sliding groove and is in relative sliding connection with the sliding groove; the lug and the sliding groove are configured to enable the anti-rotation sliding block to be in sliding connection with the lifting push rod and the anti-rotation sliding block and the lifting push rod to be relatively fixed along the circumferential direction.

The anti-rotation sliding block fixedly arranged on the inner pipe circumferentially limits the opposite surfaces of the lifting push rod, the lifting push rod and the inner pipe cannot rotate relatively, the lifting push rod is arranged on the outer pipe, and the outer pipe and the inner pipe cannot rotate relatively; the matching of the convex block and the sliding groove enables the anti-rotation sliding block and the anti-rotation bracket to be integrated in the circumferential motion, and as long as one of the anti-rotation sliding block and the anti-rotation bracket cannot rotate, the other anti-rotation sliding block cannot rotate; the rotation prevention between the sleeves and the rotation prevention of the push rod and the sleeves are integrated, so that the lifting table legs are assembled quickly and the cost is saved; more importantly, the push rod shell is provided with at least one pair of opposite surfaces, the anti-rotation sliding blocks are in sliding fit with the pair of opposite surfaces of the push rod shell and are clamped and fixed, and the anti-rotation sliding blocks do not completely wrap the push rod shell, so that contact is reduced as far as possible, and meanwhile, the sliding and stability cannot be affected.

Preferably, the lifting push rod further comprises a screw rod and a nut, the nut is arranged in the push rod shell, and the screw rod is in threaded connection with the nut; the shell of the push rod is an anti-rotating frame which comprises a base and vertical plates vertically arranged on the left side and the right side of the base; the anti-rotation sliding block is connected with the vertical plate in a sliding manner. The lifting push rod can be a common lifting push rod in the market, namely the shell of the push rod is a square tube, and can also be a lifting push rod of the type, namely the shell of the push rod is an anti-rotating frame.

Preferably, the lower end face of the outer pipe is provided with a waist-shaped hole, the base is provided with a boss in a corresponding shape in a downward protruding mode, and the boss is inserted into the waist-shaped hole and locked by a screw. The outer pipe and the anti-rotation frame are axially and circumferentially fixed relatively; after the inner pipe and the lifting push rod are prevented from rotating, the inner pipe and the outer pipe are also prevented from rotating.

Preferably, the screw nut is arranged at the upper ends of the two vertical plates, the screw rod is arranged between the two vertical plates, and when the screw rod rotates forwards, the screw rod extends upwards from the screw nut; when the screw rod rotates reversely, the screw rod retracts between the two vertical plates through the nut. The lifting push rod with the anti-rotating frame as the push rod shell has the same working principle as a common lifting push rod.

Preferably, the bottom of the screw rod is provided with a stabilizing block which is always positioned between the two vertical plates and is in lifting connection with the screw rod in a rotating way. The lower extreme is more stable when making the lead screw go up and down, reduces rocking of lead screw and the noise that the stand sent.

Preferably, the lower end of the inner wall of the inner pipe is provided with a U-shaped mounting seat, and the anti-rotation sliding block is mounted in the U-shaped mounting seat. Realize preventing changeing the fixed connection of slider and inner tube, and U type mount pad can embrace and prevent changeing the slider, makes to prevent changeing the slider and receive spacingly, keeps circumference fixed with the inner tube.

Preferably, the upper end of the screw rod is provided with a bearing, the bearing is connected with the inner pipe through a disc-shaped bearing seat, and the bearing seat is fixedly connected with the inner pipe. The circumferential relative fixation of the screw rod and the inner pipe is realized.

Preferably, the middle part of the bearing seat is recessed downwards to form a mounting groove, and the bearing is arranged in the mounting groove. The structure is more compact.

The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:

the utility model provides a lifting table leg, which is characterized in that:

the problem that the lifting table legs using circular tubes as sleeves are short of circumferential limiting is often faced, the inner tube and the lifting push rod in the lifting table legs are circumferentially fixed, and the lifting push rod and the outer tube are circumferentially fixed at the same time, so that the inner tube and the outer tube are prevented from rotating and the screw nut is prevented from rotating finally, and the lifting table legs can be lifted normally; in the utility model, the cross section of the push rod shell can be a rectangular structure and can be a square tube, the anti-rotation sliding blocks are in sliding fit with a pair of opposite surfaces of the push rod shell and are clamped and fixed, and the anti-rotation sliding blocks do not completely wrap the push rod shell and are only matched with one surface of the adjacent push rod shell, so that the contact is reduced as much as possible, and the sliding and the stability are not influenced.

Drawings

Fig. 1 is a schematic perspective view illustrating a raised state of the elevating table leg according to the embodiment of the present invention;

FIG. 2 is a schematic perspective view of a lowered state of the elevating table leg according to the embodiment of the present invention;

figure 3 is a cross-sectional view illustrating a lowered state of the elevating leg in the embodiment of the present invention;

figure 4 is a cross-sectional view illustrating a raised state of the elevating leg in accordance with one embodiment of the present invention;

FIG. 5 is a schematic perspective view of a waist-shaped hole formed in an outer tube according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a boss inserted into a kidney-shaped hole according to an embodiment of the present invention;

FIG. 7 is a schematic perspective view of the anti-rotation slider installed in the inner tube according to the embodiment of the present invention;

FIG. 8 is a perspective view of an anti-rotation slider according to an embodiment of the present invention;

FIG. 9 is a perspective view of a screw and nut mounted to an anti-rotation bracket according to an embodiment of the present invention;

fig. 10 is a perspective view illustrating a nut mounted to a rotation prevention bracket according to an embodiment of the present invention;

FIG. 11 is a schematic perspective view of an anti-rotation slider and an anti-rotation bracket according to an embodiment of the present invention;

fig. 12 is a sectional view of the rotation preventing slider and the elevating push bar in the elevating leg according to the embodiment of the present invention.

The figures are numbered: an inner tube 1; an outer tube 2; a kidney-shaped hole 21; a screw rod 3; a nut 4; an anti-rotation slider 5; a bump 51; a rotation prevention frame 6; a chute 61; a base 62; a vertical plate 63; a boss 64; a U-shaped mounting seat 7; a stabilizing block 8; a bearing 9; a bearing housing 10; and a mounting groove 11.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific embodiment of the utility model is as follows:

as shown in fig. 1 to 4, the present invention provides a lifting table leg, which comprises an inner tube 1, an outer tube 2 and a lifting push rod, the lifting table leg is the same as two common lifting table legs, the outer tube 2 is sleeved on the inner tube 1, the lifting push rod is arranged in the inner tube 1 and the outer tube 2 and vertically arranged at the bottom of the outer tube 2, and the lifting push rod is configured to drive the inner tube 1 and the outer tube 2 to relatively move along an axial direction; the inner tube 1 and the outer tube 2 of the lifting table leg use round tubes, so if no circumferential limit exists between the inner tube 1 and the outer tube 2, the inner tube and the outer tube can rotate relatively, and the lifting push rod arranged in the lifting table leg also needs to be circumferentially fixed to normally work to drive the inner tube to lift; one of the inner tube 1 and the outer tube 2 is inevitably connected with the table body to realize circumferential fixation, so that circumferential constraint can be established between the inner tube and the lifting push rod and between the lifting push rod and the outer tube, and the inner tube and the outer tube can not rotate; meanwhile, the lifting push rod can not rotate, and the normal lifting of the lifting table legs is finally realized.

Specifically, anti-rotation sliding blocks 5 fixed on the inner wall of the inner tube 1 are symmetrically arranged at the lower part of the inner tube 1, the lifting push rod comprises a push rod shell with a rectangular cross section, and the anti-rotation sliding blocks 5 are in sliding fit with a pair of opposite surfaces of the push rod shell; the push rod shell can be of a square tube structure, one of the anti-rotation sliding block 5 and the push rod shell is provided with a vertical sliding groove 61, the other one of the anti-rotation sliding block 5 and the push rod shell is provided with a convex block 51, and the convex block 51 is inserted in the sliding groove 61 and is in relative sliding connection with the sliding groove 61; the protrusion 51 and the sliding groove 61 are configured to make the rotation-preventing slider 5 and the lifting push rod slidably connected and fixed relatively to each other along the circumferential direction.

Specifically, the sliding grooves 61 may be formed on two opposite surfaces of the push rod housing having the square tube structure, the protrusions 51 may be formed on the anti-rotation slider 5, and the protrusions 51 may be inserted into the sliding grooves 61.

The lifting push rod further comprises a screw rod 3 and a nut 4; the screw nut 4 is arranged in the push rod shell, the screw rod 3 is in threaded connection with the screw nut 4, and the screw rod 3 and the screw nut 4 are configured to drive the inner pipe 1 and the outer pipe 2 to move relatively in the axial direction.

In this embodiment, the push rod housing is an anti-rotation frame 6; the lifting table legs are vertically arranged, in the embodiment, the outer pipe 2 is positioned below the inner pipe 1, the screw rod 3 is driven by the motor to rotate, and when the motor drives the screw rod 3 to rotate forwards, the screw rod 3 jacks the inner pipe 1 to be lifted; when the motor drives the screw rod 3 to rotate reversely, the screw rod 3 drives the inner tube 1 to be lowered.

Several points are required for implementing the above scheme: 1. the inner pipe 1 and the outer pipe 2 are fixed in the circumferential direction and can not rotate, and one of the inner pipe and the outer pipe is locked by the outside, for example, the inner pipe 1 is fixedly connected with a table plate or a table frame of the lifting table; 2. the nut 4 is circumferentially fixed and cannot rotate; 3. the screw rod 3 is axially and relatively fixedly connected with one of the inner tube 1 or the outer tube 2, and the screw nut 4 is axially and relatively fixedly connected with the other. In this embodiment, the circumferential direction refers to the circumferential direction of the lifting table leg.

Furthermore, as shown in fig. 3 and 4, in the present embodiment, the anti-rotation slider 5 is fixedly connected to the inner tube 1, and the anti-rotation bracket 6 is fixedly connected to the outer tube 2; the screw 4 is relatively fixedly connected with the outer tube 2 through the anti-rotation frame 6, and the screw rod 3 and the anti-rotation sliding block 5 are relatively fixed along the axial direction; because the inner tube 1 is locked by the outside and can not rotate, the anti-rotation slide block 5 which is fixedly connected with the inner tube can not rotate relatively, and because the anti-rotation slide block 5 and the anti-rotation frame 6 are relatively fixed along the circumferential direction, the anti-rotation frame 6 can not rotate, and then the screw nut 4 which is arranged on the anti-rotation frame 6 can not rotate; meanwhile, the length of the anti-rotating frame 6 is unchanged, the height of the screw nut 4 cannot be changed, and the screw nut 4 is axially and relatively fixed with the outer pipe 2.

Specifically, as shown in fig. 4, 8 and 10-12, a vertical sliding groove 61 is formed on the anti-rotation bracket 6, a convex block 51 is formed on the anti-rotation slider 5, the convex block 51 is inserted into the sliding groove 61, and the two are connected in a relatively sliding manner, so that the anti-rotation slider 5 and the anti-rotation bracket 6 are relatively fixed in the circumferential direction; after the protrusion 51 is inserted into the sliding groove 61, if the rotation-preventing frame 6 rotates, the rotation-preventing slider 5 will also rotate, and if one of the two is fixed along the circumferential direction of the column and cannot rotate, neither will rotate.

Further, as shown in fig. 7 and 12, two U-shaped mounting seats 7 are symmetrically mounted on the inner wall of the inner tube 1, and the U-shaped mounting seats 7 are located near the lower end of the inner wall of the inner tube 1; the two anti-rotation sliding blocks 5 are respectively and fixedly installed in the U-shaped installation seat 7, and the anti-rotation frame 6 is clamped between the two anti-rotation sliding blocks 5.

The anti-rotation frame 6 is fixedly installed in the outer pipe 2, specifically, as shown in fig. 5, 6, 10 and 11, the anti-rotation frame 6 includes a base 62 and vertical plates 63 vertically arranged on the left and right sides of the base 62, the vertical plates 63 are bent to form the sliding grooves 61, the sliding grooves 61 on the two vertical plates 63 are oppositely arranged, so that the anti-rotation sliding blocks 5 on the left and right sides insert the protrusions 51 into the sliding grooves 61; the lower end of the outer pipe 2 is provided with a waist-shaped hole 21, the base 62 is clamped in the middle by the vertical plates 63 at the two sides, the base 62 is downwards provided with a boss 64 corresponding to the shape of the waist-shaped hole 21 in a protruding mode, the boss 64 is inserted into the waist-shaped hole 21 and the boss 64 is locked by screws, and therefore the anti-rotation frame 6 is fixedly connected with the outer pipe 2 relatively; the screw nut 4 is arranged at the upper ends of two vertical plates 63, the length of the vertical plate 63 is similar to that of the screw rod 3, and the screw rod 3 is arranged between the two vertical plates 63; under the condition that the upright post can be normally used, when the screw rod 3 rotates forwards, the screw rod 3 extends upwards from the nut 4; when the screw rod 3 rotates reversely, the screw rod 3 retracts between the two vertical plates 63 through the nut 4.

The inner tube 1 cannot rotate, so that the anti-rotation sliding block 5 installed in the U-shaped installation seat 7 cannot rotate, the lug 51 on the anti-rotation sliding block 5 is inserted in the sliding groove 61 of the anti-rotation frame 6, the anti-rotation frame 6 cannot rotate, the anti-rotation frame 6 and the outer tube 2 are kept relatively fixed, and the outer tube 2 cannot rotate; the screw 4 is arranged on the anti-rotation frame 6, the anti-rotation frame 6 is fixedly connected with the outer tube 2 relatively through the base 62, so that the screw 4 is relatively fixed with the outer tube 2 in the axial direction, and the screw rod 3 can rotate and lift at the same time.

In addition, as shown in fig. 3 and 10, the bottom of the screw rod 3 is provided with a stabilizing block 8 which is always located between two vertical plates 63, the stabilizing block 8 is rotatably connected with the screw rod 3, and when the screw rod 3 goes up and down, the lifting block at the bottom of the screw rod 3 provides the lower end stability for the screw rod 3 so as to prevent the screw rod 3 from excessively shaking. The upper end of the screw rod 3 is provided with a bearing 9, the bearing 9 is connected with the outer tube 2 through a disc-shaped bearing seat 10, the bearing seat 10 is fixedly connected with the outer tube 2, the middle part of the bearing seat 10 is downwards sunken to form a circular mounting groove 11, and the bearing 9 is arranged in the mounting groove 11, so that the screw rod 3 can rotate and simultaneously keep axial relative fixation with the inner tube 1.

After the three points are reached, the lifting table leg of the embodiment can be lifted normally; the screw rod 3, the nut 4 and the anti-rotation frame 6 are regarded as a lifting push rod, so that the anti-rotation of the inner tube 1 and the outer tube 2 and the anti-rotation of the sleeve and the lifting push rod are realized in the embodiment; if the rotation prevention frame 6 is closed, the rotation prevention frame 6, the screw rod 3 and the nut 4 form a common lifting push rod form on the market, but the structure of the rotation prevention frame is different from that of the common lifting push rod.

Claims (8)

1. A lifting table leg is characterized in that: the lifting push rod is arranged in the inner pipe and the outer pipe and vertically arranged at the bottom of the outer pipe, and the lifting push rod is configured to drive the inner pipe and the outer pipe to move relatively in the axial direction; the lower part of the inner pipe is symmetrically provided with anti-rotation sliding blocks fixed on the inner wall of the inner pipe, the lifting push rod comprises a push rod shell, and the anti-rotation sliding blocks are in sliding fit with a pair of opposite surfaces of the push rod shell; one of the anti-rotation sliding block and the push rod shell is provided with a vertical sliding groove, the other of the anti-rotation sliding block and the push rod shell is provided with a convex block, and the convex block is inserted in the sliding groove and is in relative sliding connection with the sliding groove; the lug and the sliding groove are configured to enable the anti-rotation sliding block to be in sliding connection with the lifting push rod and the anti-rotation sliding block and the lifting push rod to be relatively fixed along the circumferential direction.

2. A lifting table leg as claimed in claim 1, wherein: the lifting push rod further comprises a screw rod and a nut, the nut is arranged in the push rod shell, and the screw rod is in threaded connection with the nut; the shell of the push rod is an anti-rotating frame which comprises a base and vertical plates vertically arranged on the left side and the right side of the base; the anti-rotation sliding block is connected with the vertical plate in a sliding manner.

3. A lifting table leg as claimed in claim 2, wherein: the lower end face of the outer pipe is provided with a kidney-shaped hole, the base is provided with a boss in a downward protruding shape, and the boss is inserted into the kidney-shaped hole and locked by a screw.

4. A lifting table leg as claimed in claim 2, wherein: the screw nut is arranged at the upper ends of the two vertical plates, the screw rod is arranged between the two vertical plates, and when the screw rod rotates forwards, the screw rod extends upwards from the screw nut; when the screw rod rotates reversely, the screw rod retracts between the two vertical plates through the nut.

5. A lifting leg as claimed in claim 4, wherein: the bottom of the screw rod is provided with a stabilizing block which is always positioned between the two vertical plates and can lift up and down, and the stabilizing block is rotationally connected with the screw rod.

6. A lifting table leg as claimed in claim 1, wherein: the lower part of the inner wall of the inner pipe is provided with a U-shaped mounting seat, and an anti-rotation sliding block is arranged in the U-shaped mounting seat.

7. A lifting table leg as claimed in claim 2, wherein: the upper end of the screw rod is provided with a bearing, the bearing is connected with the inner pipe through a disc-shaped bearing seat, and the bearing seat is fixedly connected with the inner pipe.

8. A lifting leg as claimed in claim 7, wherein: the bearing seat is sunken downwards in the middle to form a mounting groove, and the bearing is arranged in the mounting groove.

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