CN210611422U

CN210611422U - Ball linear rail type table leg

Info

Publication number: CN210611422U
Application number: CN201921126305.1U
Authority: CN
Inventors: 乔彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-05-26
Anticipated expiration: 2029-07-18

Abstract

A ball linear rail type table leg comprises a lifting inner leg (1) and a fixed outer leg (2), and is characterized in that balls (3) are additionally arranged between the lifting inner leg (1) and the fixed outer leg (2); the lifting inner leg (1) is provided with a limiting groove (4) for preventing the ball (3) from moving, and the limiting groove (4) and the fixed outer leg (2) form a guide groove for the ball (3) to move up and down. The utility model discloses both guarantee to go up and down in a flexible way, can reduce frictional resistance again by a wide margin for it is steady to go up and down, simple structure makes, convenient assembling simultaneously.

Description

Ball linear rail type table leg

Technical Field

The utility model relates to a ball linear rail formula table foot, especially a tensile table foot for lift table.

Background

People can use various tables when working and studying, cervical spondylosis, lumbar spondylosis and other diseases are easily caused when people sit on common traditional tables for a long time to work and study, the common traditional tables are properly changed into a posture that people often stand to use the tables, the cervical spondylosis, the lumbar spondylosis and the like can be effectively prevented, scientific research shows that harmfulness of sitting for a long time is even greater than damage caused by smoking, a certain amount of calories can be additionally consumed when people sit on the tables for a long time, and the body and the weight are maintained, so that the comprehensive health of the body is facilitated. The existing lifting office table is designed to be suitable for users with different body heights, and various office tables with hand-operated, double-motor or even multi-motor electric height adjustment and single-gas rod or double-gas rod (gas spring) height adjustment are designed. In the existing various lifting tables, the connecting pieces of the fixed table legs and the sliding lifting table legs generally adopt a sliding friction structure combining a plastic elastic sheet 5 and a plastic flat sheet 6, as shown in fig. 1, the adjustment of the gap between the fixed table legs and the sliding lifting table legs is very troublesome, the gap is too small, the friction resistance is increased, the lifting power needs to be increased, the power assembly is very easy to damage, and the manual lifting table and the single-double air rod (air spring) power driving lifting tables consume great physical strength and are very humanized; the gap is too small, the friction resistance is reduced, but the fixed table legs and the sliding lifting table legs are too loose, so that the whole table is unstable and shakes and cannot be used.

Disclosure of Invention

The invention aims to solve the problems that lifting legs of the existing lifting office table with two or more single-column supporting structures are either difficult to lift due to large resistance or unstable and sway due to large gaps, and designs a lifting table stretching table leg which is simple in structure, small in resistance, stable and free of sway, easy to produce and assemble and moderate in manufacturing cost.

The technical scheme of the invention is as follows:

a ball linear rail type table leg comprises a lifting inner leg 1 and a fixed outer leg 2 and is characterized in that balls 3 are additionally arranged between the lifting inner leg 1 and the fixed outer leg 2.

The lifting inner leg 1 is provided with a limiting groove 4 for preventing the ball 3 from moving, and the limiting groove 4 and the fixed outer leg 2 form a guide groove for the ball 3 to move up and down.

For the square or rectangular lifting inner leg 1 and the fixed outer leg 2, the guide grooves are located at the four corners of the square or rectangle.

For the cylindrical lifting inner leg 1 and the fixed outer leg 2, the guide grooves are uniformly distributed in the circumferential direction of the cylinder, and the guide grooves on the lifting inner leg are of an inwards concave structure.

The utility model has the advantages that:

the utility model discloses both guarantee to go up and down in a flexible way, can reduce frictional resistance again by a wide margin for go up and down steadily.

The utility model discloses simple structure, manufacturing, convenient assembling.

Drawings

Fig. 1 is a schematic structural view of a conventional elevating table leg.

Figure 2 is a cross-sectional view of the rectangular table leg of the present invention.

Detailed Description

The invention is further described by the following structural drawings and examples.

As shown in fig. 2.

A ball linear rail type table leg comprises a lifting inner leg 1 and a fixed outer leg 2, wherein the lifting inner leg 1 and the fixed outer leg 2 can be extruded and stretched by aluminum alloy or formed by finish rolling of steel pipes. Both are nested and filled with the ball 3, and then the two are encapsulated from both ends to prevent the ball from running out, and lubricating grease should be added in the groove of the ball 3. Specifically, the lifting inner leg 1 may be provided with a stopper groove 4 for preventing the ball 3 from being displaced, the stopper groove 4 and the fixed outer leg 2 may form a guide groove in which the ball 3 moves up and down, and the ball 3 may be filled in each guide groove. For the square or rectangular lifting inner leg 1 and the fixed outer leg 2 shown in fig. 2, the guide grooves are located at four corners of the square or rectangular, the four corners of the lifting inner leg 1 are recessed to form a main body of the guide grooves, and the corresponding positions of the fixed outer leg 2 are designed to be in circular arc transition.

Among all the frictional forces, F (sliding frictional force) = P (pressure) × μ (object surface friction coefficient); the smaller the gap, the larger the P (pressure) value, and the more the value of mu (surface friction coefficient of the object) depends on the surface smoothness of the table foot material and the lubricating condition of the lubricating liquid. So F (sliding friction) is a considerable value anyway.

The resistance experienced by an object to rolling (or having a tendency to roll) on another object is caused by deformation of the contact between the object and the support surface. Typically measured by rolling friction torque. The magnitude of the rolling friction torque is proportional to the support force Fn. That is, M = k · Fn, k is a proportionality constant and is referred to as "rolling friction coefficient". For example, the K value between the train wheel and the rail is about 0.05 cm. The harder the round wheel and the support surface are, the less rolling friction is. If the two are absolutely rigid bodies, the rolling friction is zero. At this time, only one line is contacted between the wheel and the supporting surface, and the supporting force N passes through the axle center of the round wheel. The rolling friction coefficient has a dimension of length and has the meaning of moment arm, often calculated in millimeters. The size of the contact surface is mainly determined by the material properties of the objects in contact with each other and the surface conditions (roughness, humidity, etc.), and if the two are absolutely rigid bodies, F (rolling friction) approaches zero when the wheel and the supporting surface approach a line infinitely.

The result is that F (sliding friction) is much greater than F (rolling friction) for the same load, by more than an order of magnitude.

The modern aluminum alloy extrusion and stretching workpiece forming process and the steel pipe finish rolling forming process are quite mature, the mature process can reach the manufacturing tolerance of a wire level, the surface finish can reach a quite high level, the price is moderate, the mass production and the assembly are easy, the absolute rigid body which can meet the requirement that F (rolling friction force) is close to zero can be manufactured, the high-precision ball which is cheap and used for manufacturing the high-precision ball bearing is combined, the rolling friction lifting table stretching table leg which meets various appearance requirements can be produced, the structure is simple, the appearance is changeable, attractive and firm, the resistance is small, the table is stable and does not shake, and the production and the assembly are easy.

The utility model discloses the part that does not relate to is the same with prior art or can adopt prior art to realize.

Claims

1. A ball linear rail type table leg comprises a lifting inner leg (1) and a fixed outer leg (2), and is characterized in that balls (3) are additionally arranged between the lifting inner leg (1) and the fixed outer leg (2); the lifting inner leg (1) is provided with a limiting groove (4) for preventing the ball (3) from moving, and the limiting groove (4) and the fixed outer leg (2) form a guide groove for the ball (3) to move up and down.

2. Ball linear rail table foot according to claim 1, characterised in that for the square or rectangular lifting inner leg (1) and the fixed outer leg (2) the guide slots are located at the four corners of the square or rectangle.

3. A ball linear rail table foot as claimed in claim 1, characterised in that for the cylindrical lifting inner leg (1) and the fixed outer leg (2), the guide slots are evenly distributed along the circumference of the cylinder and the guide slots in the lifting inner leg are of a concave configuration.