Guide sleeve and lifting table leg

Abstract

The utility model relates to the technical field of linear guiding, and discloses a guide sleeve and a lifting table leg, the lifting table leg comprises a fixed pipe and an adjusting pipe which is lifted in the fixed pipe, the guide sleeve is assembled between the fixed pipe and the adjusting pipe, the guide sleeve comprises a sleeve body, a plurality of groups of enclasping lubricating components are arranged on the inner wall of the sleeve body at intervals in the circumferential direction of the sleeve body, and the enclasping lubricating components are arranged in the sleeve body. The enclasping guide assembly comprises a movable block which moves on the sleeve body in a guiding mode in the tendency of inclining towards the axis of the sleeve body by a preset acute angle; the rolling body is rotationally arranged on the movable block and partially extends to one side, close to the axis of the sleeve body, of the movable block; the elastic piece is arranged between the sleeve body and the movable block and used for driving the rolling body to move to the position closest to the axis of the sleeve body along with the movable block, and the guide sleeve can eliminate shaking caused by size deviation or assembly deviation of the adjusting pipe, and meanwhile the adjusting pipe can smoothly move in the guide sleeve in a labor-saving mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to linear guide technical field especially, and it relates to a guide sleeve pipe and lift table leg. BACKGROUND

[0002] The desk is the necessary teaching aid of school, in order to increase the adaptability of desk, the desk leg of current market desk basically can be adjusted in the lifting. The lifting desk leg mostly includes the fixed pipe and the adjusting pipe that can be lifted relative to the fixed pipe, the bottom of fixed pipe is fixed with the supporting leg, the top of adjusting pipe is fixed with the desktop, and the inner wall of fixed pipe is fixed with the guide sleeve that can be inserted and vertically guided for adjusting pipe.

[0003] In order to improve the fluency of adjusting pipe lifting, part of guide sleeve is provided with ball for reducing friction, specific structure can refer to the announcement number CN213733591U of Chinese patent disclosure "a kind of integrated ball guide sleeve", including guide sleeve, the inner guide hole of guide sleeve is provided with ball bushing, ball bushing is uniformly provided with ball, ball bushing is fixed with guide sleeve by fixing piece.

[0004] This ball guide sleeve is applied to the inside of desk leg, can improve the fluency of adjusting pipe lifting relative to fixed pipe, but, adjusting pipe and guide sleeve due to production error, often lead to the problem that both are assembled and prone to too tight or too loose, too tight will lead to the problem that adjusting pipe lifting is jammed, too loose will lead to the problem that adjusting pipe shakes when lifting. INNOVATION CONTENT

[0005] The utility model aims at the shortcoming that the existing guide sleeve structure cannot eliminate the problem that guide sleeve and pipe fittings matched with it are too tight or too loose due to error, the first purpose is to provide a kind of guide sleeve pipe that can adaptively eliminate matching error.

[0006] In order to solve the above technical problem, the utility model is solved by the following technical scheme:

[0007] A kind of guide sleeve pipe, including sleeve body, the inner wall of sleeve body is spaced apart with several groups of embrace and lubricates component around the circumference of sleeve body, embrace and guide component includes:

[0008] Movable block, with the tendency of the inclination of preset acute angle to the axis of sleeve body, is guided and moved on sleeve body;

[0009] Rolling body, rotationally arranged on movable block and partially extended to the side of movable block close to the axis of sleeve body;

[0010] Elastic member, arranged between sleeve body and movable block, for driving rolling body to move to the axis of sleeve body closest to movable block.

[0011] With the above scheme, the clamping guide assembly is added, and the movable block is inclined to the axial direction of the sleeve body (i.e., the inner wall of the sleeve body is inclined at a preset acute angle), so that the adjustment of the rolling body along the axial distance of the sleeve body is realized, and all rolling bodies can be elastically pressed on the outer ring wall of the adjusting pipe at all times, which not only overcomes the shaking caused by the size deviation or assembly deviation of the adjusting pipe, but also significantly reduces the significant increase in friction caused by the elastic force of the elastic member. In combination with the design of the rolling body, the guide sleeve can not only eliminate the adverse effects caused by the size deviation or assembly deviation of the adjusting pipe, but also enable the adjusting pipe to move smoothly and labor-savingly in the guide sleeve.

[0012] Preferably, the angle between the movable block and the axial direction of the sleeve body is 5°-15°.

[0013] Preferably, the angle between the movable block and the axial direction of the sleeve body is 5°-15°.

[0014] Preferably, the cross section of the sleeve body is circular, oval, regular polygon or rectangular.

[0015] With the above scheme, the cross section of the sleeve body can be adaptively changed according to the cross section of the adjusting pipe matched with the sleeve body, and the clamping and lubricating assembly can be changed in number and installation position according to the actual shape of the sleeve body, and the inclination angle of the movable block can also be adaptively changed within the range.

[0016] Preferably, a cooperation structure for guiding and stroke limiting of the movable block is arranged between the movable block and the sleeve body, and the cooperation structure comprises a first through groove provided in the side wall of the sleeve body and capable of accommodating and allowing the movable block to move, guide rods protruding from both sides of the movable block, and guide grooves obliquely arranged on both side walls of the first through groove and capable of partially inserting the guide rods, and the inclination angle of the guide groove is the angle between the movable block and the axial direction of the sleeve body.

[0017] With the above scheme, the inclination angle of the guide groove represents the angle between the movable block and the inner wall of the sleeve body when the movable block moves, and the length of the guide groove can be used to convert the stroke of the radial movement of the movable block and to convert the error range that can be eliminated.

[0018] Preferably, the rolling body is a roller, and a second through groove is provided on the movable block, which can accommodate the roller and partially expose the roller, and the central axis of the roller passes through the second through groove and its extension is a guide rod that is inserted and cooperated with the guide groove.

[0019] With the above scheme, the central axis assembles the roller, the movable block and the sleeve body, and one component simultaneously has the functions of supporting, connecting and guiding, which is ingenious in structure, and the roller cannot be deflected, and after elastically abutting against the adjusting pipe, the roller can also prevent the slight deflection of the adjusting pipe.

[0020] Preferably, the guide grooves are arranged in at least two groups along the axial direction of the sleeve body, and the corresponding number of rollers are arranged correspondingly.

[0021] According to the above scheme, since the central axis is a circular axis, the rollers need to be arranged in two groups or more to prevent the movable block from deflecting around the axis and ensure that the movable block is always in a vertical state and inclined to the axis at a preset angle.

[0022] Preferably, the elastic member is a spring, a positioning column is protruded at the bottom of the first through groove, a positioning groove is recessed at the lower end of the movable block, the lower end of the spring is sleeved outside the positioning column, and the upper end of the spring is inserted into the positioning groove, and the two ends of the spring are elastically abutted with the bottom of the first through groove and the bottom of the positioning groove, respectively.

[0023] According to the above scheme, the spring can provide a spring force to press the roller against the outer wall of the adjusting pipe, and the spring itself can also eliminate the angular deviation caused by the movement of the movable block through torsion.

[0024] Preferably, a first weight-reducing groove is recessed between the two adjacent first through grooves on the outer wall of the sleeve body, and the two sides of the guide groove are penetrated through the first weight-reducing groove; and a second weight-reducing groove is arranged between the adjacent rollers on the movable block.

[0025] According to the above scheme, the arrangement of the weight-reducing groove can reduce the material and reduce the cost.

[0026] Preferably, a lap joint ring is protruded horizontally outward at the upper end of the sleeve body, and the lower end of the sleeve body is designed in a conical frustum shape with the pointed end downward.

[0027] According to the above scheme, the lap joint ring at the upper end of the sleeve body is used to limit the insertion depth of the sleeve body, and the conical frustum design at the lower end of the sleeve body facilitates the insertion of the sleeve body.

[0028] The second object of the utility model is to provide a lifting table leg, which comprises a fixed pipe and an adjusting pipe, the guide sleeve is arranged at one end of the fixed pipe in an interference fit, and the outer wall of the adjusting pipe is elastically abutted with the rolling body.

[0029] According to the above scheme, the guide sleeve is applied to the lifting table leg, which can make the adjusting pipe more smooth, stable and labor-saving relative to the fixed pipe.

[0030] This utility model, by adopting the above technical solution, has significant technical effects: The addition of a clamping guide assembly, in which the movable block moves in a 5°–15° inclination towards the axis of the sleeve, allows for adjustment of the distance between the rollers and the axis of the sleeve. This ensures that all rollers can always elastically press against the outer ring wall of the adjusting tube, overcoming not only the shaking caused by dimensional or assembly deviations of the adjusting tube, but also significantly reducing the significant increase in friction caused by spring force. With the cooperation of the rollers, the guide sleeve eliminates the adverse effects caused by dimensional or assembly deviations of the adjusting tube while enabling the adjusting tube to move very stably, smoothly, and effortlessly within it. Attached Figure Description

[0031] Figure 1 This is an isometric view of a guide sleeve according to this embodiment;

[0032] Figure 2 This is a front view of a guide sleeve according to this embodiment;

[0033] Figure 3 yes Figure 2 A sectional view of AA;

[0034] Figure 4 This is an isometric view of the lifting table legs equipped with guide sleeves in this embodiment.

[0035] The parts referred to by the numbers in the above attached figures are as follows: 1. Sleeve; 2. First through groove; 3. First weight reduction groove; 4. Overlapping ring; 5. Movable block; 6. Roller; 7. Second through groove; 8. Second weight reduction groove; 9. Guide groove; 10. Guide rod; 11. Spring; 12. Positioning post; 13. Positioning groove; 14. Fixing tube; 15. Adjusting tube. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0037] A type of height-adjustable table leg, as shown in the reference Figures 1-4 As shown, it includes a fixed tube 14 fixed to the support leg and an adjusting tube 15 fixed to the tabletop. The lower end of the adjusting tube 15 is inserted into the fixed tube 14, and a guide tube sleeve is interference-fitted to the upper end of the fixed tube 14 to allow the adjusting tube 15 to rise and fall smoothly, stably and effortlessly.

[0038] The guide sleeve includes sleeve body 1, see details. Figure 1 As shown, the cross-section of the sleeve 1 is circular. The upper end of the sleeve 1 extends outward horizontally with an overlapping ring 4 that can overlap with the upper end of the fixing tube 14. The lower end of the sleeve 1 is set into a frustoconical shape to facilitate the insertion of the fixing tube 14. The outer ring wall of the sleeve 1 is provided with three first through grooves 2 evenly spaced around the periphery. A set of clamping and lubrication components is assembled in each first through groove 2.

[0039] The embracing and guiding assembly comprises a movable block 5 guided to slide at an acute angle of 10° with the inner wall of the sleeve 1, a roller 6 is assembled on the side wall of the movable block 5 close to the axis of the sleeve 1, and a spring 11 is arranged between the bottom of the first through groove 2 and the bottom of the movable block 5 to enable the roller 6 to be elastically pressed against the outer wall of the adjusting pipe 15.

[0040] The assembling structure of the roller 6, the movable block 5 and the sleeve 1 is as follows: a second through groove 7 is formed in the movable block 5 to assemble the roller 6 and enable the roller 6 to partially expose the movable block 5, the roller 6 is rotatably sleeved on a center shaft, the two ends of the center shaft of the roller 6 extend to the outside of the movable block 5 after penetrating through the groove wall of the second through groove 7, guide grooves 9 are arranged on the two side walls of the first through groove 2 and inclined to the axis of the sleeve 1 by 10°, the two extending ends of the center shaft become guide rods 10 guided and matched with the guide grooves 9, and two sets of guide grooves 9 are arranged along the axial direction of the sleeve 1, and two sets of rollers 6 are correspondingly arranged.

[0041] A positioning column 12 is protruded on the bottom of the first through groove 2, a positioning groove 13 is recessed on the lower end of the movable block 5, the lower end of the spring 11 is sleeved on the outside of the positioning column 12, and the upper end of the spring 11 is inserted into the positioning groove 13, the two ends of the spring 11 are elastically abutted and matched with the bottom of the first through groove 2 and the bottom of the positioning groove 13 respectively, and the spring 11 is used to drive the movable block 5 to move at an inclined angle of 10° with the inner wall of the sleeve 1 until the roller 6 elastically pressed thereon is pressed against the outer wall of the adjusting pipe 15.

[0042] A first weight-reducing groove 3 is recessed on the outer wall of the sleeve 1 between the two adjacent first through grooves 2, the two sides of the guide groove 9 are penetrated through by the first weight-reducing groove 3, which facilitates the assembly of the center shaft; and a second weight-reducing groove 8 is arranged on the movable block 5 between the two adjacent rollers 6.

[0043] Three sets of embracing and guiding assemblies are uniformly and evenly arranged on the inner ring wall of the sleeve 1 in the scheme, the movable block 5 is guided and moved in a trend of being inclined to the axis of the sleeve 1 by 10°, that is, the adjustment of the rollers 6 along the axial distance of the sleeve 1 is realized, so that all the rollers 6 can be elastically pressed against the outer ring wall of the adjusting pipe 15 at all times, which not only can overcome the shaking caused by the size deviation or assembly deviation of the adjusting pipe 15, but also can significantly reduce the significant increase of the friction caused by the spring force of the spring 11, and under the cooperation of the rollers 6, the guiding sleeve can not only eliminate the adverse effects caused by the size deviation or assembly deviation of the adjusting pipe 15, but also can enable the adjusting pipe 15 to move very stably, smoothly and labor-savingly in the guiding sleeve.

[0044] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A guide cannula comprising a sleeve (1), characterised in that: The inner wall of the sleeve body (1) is provided with a plurality of groups of embracing and lubricating assemblies which are spaced apart along the circumference of the sleeve body (1), and the embracing and guiding assembly comprises: a movable block (5) which is guided to move on the sleeve body (1) with a preset acute angle of inclination to the axis of the sleeve body (1); a rolling body which is rotatably arranged on the movable block (5) and partially extends to the side of the movable block (5) close to the axis of the sleeve body (1); a resilient member which is arranged between the sleeve body (1) and the movable block (5) and is used to drive the movable block (5) to move to the position closest to the axis of the sleeve body (1) at the end of the movable block (5) close to the axis of the sleeve body (1) and to drive the rolling body to move to the position closest to the axis of the sleeve body (1) along with the movable block (5).

2. A guide sleeve according to claim 1, characterised in that: The acute angle of inclination of the movable block (5) to the axis of the sleeve body (1) is 5°-15°.

3. A guide sleeve according to claim 2, characterised in that: The cross section of the sleeve body (1) is circular or elliptical or regular polygonal or rectangular.

4. A guide sleeve according to claim 2 or 3, characterised in that: Cooperating structures for guiding and stroke limiting of the movable block (5) are arranged between the movable block (5) and the sleeve body (1), and the cooperating structures comprise a first through slot (2) which is formed in the side wall of the sleeve body (1) and can accommodate and allow the movable block (5) to move, guide rods (10) which are protrudingly arranged on both sides of the movable block (5), and guide grooves (9) which are obliquely arranged on the side walls of the first through slot (2) and can partially receive the guide rods (10), and the oblique angle of the guide grooves (9) is the angle of inclination of the movable block (5) to the axis of the sleeve body (1).

5. A guide sleeve according to claim 4, characterised in that: The rolling body is a roller (6), and a second through slot (7) which can accommodate the roller (6) and partially expose the roller (6) is formed in the movable block (5), and the central axis of the roller (6) passes through the second through slot (7) and the extended section thereof is the guide rod (10) which is inserted and cooperated with the guide groove (9).

6. A guide sleeve according to claim 5, characterised in that: The guide grooves (9) are spaced apart along the axial direction of the sleeve body (1) and are arranged in at least two groups, and the rollers (6) are correspondingly arranged in the same number of groups.

7. A guide sleeve according to claim 4, characterized in that: The resilient member is a spring (11), a positioning column (12) is protrudingly arranged at the bottom of the first through slot (2), a positioning groove (13) is recessed at the lower end of the movable block (5), the lower end of the spring (11) is sleeved on the outside of the positioning column (12), the upper end of the spring (11) is inserted into the positioning groove (13), and the two ends of the spring (11) are respectively elastically abutted and cooperated with the bottom of the first through slot (2) and the bottom of the positioning groove (13).

8. A guide sleeve according to claim 6, characterized in that: A first weight-reducing groove (3) is recessed between the adjacent two first through slots (2) on the outer wall of the sleeve body (1) and drives the guide grooves (9) to be arranged through the two sides thereof; and a second weight-reducing groove (8) is arranged between the adjacent rollers (6) on the movable block (5).

9. A guide sleeve according to claim 1, characterized in that: A lap joint ring (4) is horizontally and outwardly protrudingly arranged at the upper end of the sleeve body (1), and the lower end of the sleeve body (1) is arranged in the shape of a conical frustum with the pointed end downward.

10. A lift table leg comprising a fixed tube (14) and an adjustment tube (15), characterized in that: An adjusting pipe (15) is inserted into the guiding sleeve pipe and the outer wall of the adjusting pipe (15) is elastically abutted and cooperated with the rolling body.

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