CN111520405A - Heavy duty linear guide - Google Patents

Abstract

The invention relates to a bearing type linear guide rail which comprises a linear rail and a sliding block connected to the linear rail in a sliding mode, wherein an injection molding layer is arranged between the sliding block and the linear rail and fixedly arranged on the sliding block, the surface, away from the sliding block, of the injection molding layer is in contact with the linear rail, a plurality of reinforcing grooves are formed in one side, facing the linear rail, of the sliding block, and the injection molding layer is embedded in the reinforcing grooves. The sliding block slides on the linear rail through the injection layer, and the sliding block and the linear rail are in a surface contact state, so that the bearing capacity of the sliding block is higher, the surface friction coefficient of the injection layer is low, the wear resistance is high, transition can be effectively carried out between the sliding block and the linear rail, the abrasion loss of the sliding block is reduced, the service life of the sliding block is prolonged, and the bearing type linear guide rail is particularly suitable for high-bearing and low-moving-speed working occasions.

Description

Heavy duty linear guide

technical field

The invention relates to the technical field of guide rails, in particular to a load-bearing linear guide rail.

Background technique

A guide rail is a groove or ridge made of metal or other materials that can bear, fix, guide and reduce friction of moving devices or equipment.

Chinese Patent Publication No. CN202484086U discloses a rolling linear guide rail pair using drum-shaped rollers, including a guide rail, a sliding block movably installed on the guide rail, a return device on the sliding block, two sides of the guide rail and the inner surface of the sliding block Each of the four grooves is provided with drum-shaped rollers.

The above-mentioned prior art solutions have the following defects: the sliding block is supported on the guide rail by the drum-shaped roller, and when the weight of the moving device connected with the sliding block is not large, the moving accuracy of the sliding block is acceptable. When the rolling linear guide pair of the drum roller is used in a working environment with high load-bearing requirements, the bearing pressure is all concentrated on the drum roller, and the drum roller is in line contact with the guide rail, so the drum roller is easy to Deformation occurs, which greatly reduces the movement accuracy of the slider, and will quickly lose the service life of the guide rail.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, one of the objectives of the present invention is to provide a load-bearing linear guide rail suitable for high-load-bearing and low-speed work situations.

The above-mentioned purpose of the present invention is achieved through the following technical solutions: a load-bearing linear guide rail includes a linear guide rail and a slider slidably connected to the linear rail, and an injection molding layer is provided between the slider and the linear rail.

By adopting the above technical solution, the slider slides on the line rail through the injection molding layer, and the slider and the line rail are in a state of surface contact at this time, compared with the prior art in which a plurality of rollers pass between the slider and the line rail. Multi-line contact, this surface contact method makes the bearing capacity of the slider stronger, and the surface of the injection layer has a low friction coefficient and strong wear resistance, which can effectively transition between the slider and the line rail, reducing the number of sliders This kind of heavy-duty linear guideway is especially suitable for high-load-bearing and low-speed work situations.

In a preferred example of the present invention, the injection molding layer may be further configured as follows: the injection molding layer is fixed on the slider, and the surface of the injection molding layer facing away from the slider is in contact with the line rail.

By adopting the above technical solution, the size of the slider is smaller than that of the linear rail. Therefore, the method of fixing the injection molding layer on the slider requires less material and lower manufacturing cost. Since the size of the slider is usually small, the injection molding difficulty is also high. It is greatly reduced. Even after the service life of the slider is over, the operator can quickly replace the slider with a new one, reducing maintenance costs.

In a preferred example of the present invention, it can be further configured that: a side of the slider facing the line rail is provided with a plurality of reinforcement grooves, and the injection molding layer is embedded in the reinforcement grooves.

By adopting the above technical solution, several reinforcement grooves and the surface of the slider together form an uneven surface. After the injection molding layer is solidified, the side of the injection molding layer facing the slider will penetrate into the reinforcement layer, thereby improving the relationship between the injection molding layer and the slider. This setting does not require finishing the inner side of the slider, because even if the surface of the slider is rough, it will not affect the final accuracy, but will improve the connection strength between the injection layer and the slider; machining When sliding the slider, it is only necessary to polish the surface of the injection molding layer which is easier to process to improve the surface accuracy of the injection molding layer, which reduces the processing cost and processing difficulty.

In a preferred example of the present invention, it can be further configured as follows: the surfaces where the slider and the top of the line rail are matched are set as area A, area B, and area C, the area B is located between the area A and area C, and the area B is located between the area A and the area C. Areas A and C are in contact with the top of the wire rail through the injection molding layer, and there is a gap between the area B and the top of the wire rail.

By adopting the above technical solution, since the pressure between the slider and the top of the line rail is the largest, the contact of the injection molding layer alone can easily cause the injection molding layer to be deformed under pressure and affect the matching accuracy between the line rails of the slider. At this time, the slider The B area is directly in contact with the top of the line rail, which can limit and guide the movement of the slider and improve the movement accuracy of the slider. Part of the pressure, thereby reducing the pressure and friction between the B area and the top of the line rail, which facilitates the smooth sliding of the slider on the line rail.

In a preferred example of the present invention, it may be further configured that: a transition between the top surface and the side surface of the line rail passes through a rounded corner, and the arc of the rounded corner is greater than or equal to 90°.

By adopting the above technical solution, the rounded corner can eliminate the sharp part of the edge of the line rail, thereby reducing the cutting damage of the line rail to the slider, and when the arc of the rounded corner is greater than 90°, a section is formed between the rounded corner and the side of the line rail To reduce the contact area of the side wall of the slider near the rounded corner, it can effectively reduce the pressure concentration at the intersection of the top surface and the side surface of the slider, and improve the sliding smoothness of the slider.

In a preferred example of the present invention, it can be further configured that: the material of the injection layer is acrylic glue.

By adopting the above technical solution, the acrylic resin has a small shrinkage rate and high compressive strength after curing, which reduces the possibility of deformation of the injection molding layer after the slider is pressed, and ensures the sliding accuracy of the slider on the line rail.

In a preferred example of the present invention, it can be further configured that: the top surface of the line rail is provided with a plurality of installation screw holes penetrating the line rail along the length direction of the line rail.

By adopting the above technical solutions, the operator can pass the bolts through the mounting screw holes and fix them on the machine tool, so as to quickly and conveniently fix the line rail on the machine tool, and the mounting screw holes can also reduce the overall weight of the line rail.

To sum up, the present invention includes at least one of the following beneficial technical effects:

1. The slider slides on the line rail through the injection molding layer. At this time, the slider and the line rail are in a state of surface contact. This surface contact method makes the bearing capacity of the slider stronger, and the friction coefficient of the surface of the injection molding layer is low. Strong wear resistance, can effectively transition between the slider and the line rail, reduce the wear of the slider, and prolong the service life of the slider, especially suitable for high-load-bearing and low-speed work situations;

2. The side of the injection layer facing the slider is penetrated and embedded in the reinforcement layer, which can improve the connection strength between the injection layer and the slider.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of this embodiment.

FIG. 2 is a schematic structural diagram for embodying the injection molding layer in this embodiment.

FIG. 3 is a partial enlarged schematic view of part A in FIG. 2 .

In the figure, 1, line rail; 11, trapezoidal guide groove; 2, slider; 21, reinforcement groove; 22, area A; 23, area B; 24, area C; 26, trapezoidal protrusion; 3, injection molding layer; 4. Rounded corners; 41. Vacancy; 5. Installation screw holes.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 2 , it is a load-bearing linear guide rail disclosed in the present invention, including a linear guide 1 and a slider 2 . Trapezoidal guide grooves 11 are provided on both sides of the linear guide 1 along the length direction, and the slider 2 is slidably connected to the linear guide. 1, and the two inner sides of the slider 2 facing the line rail 1 along the length direction are provided with trapezoidal protrusions 26 matching with the trapezoidal guide groove 11. The cooperation of the trapezoidal protrusion 26 and the trapezoidal guide groove 11 can be The sliding of the slider 2 acts as a guide limit to improve the sliding accuracy of the slider 2 on the rail 1.

Referring to FIG. 2 , an injection molding layer 3 is provided on the inner side wall of the slider 2 facing the line rail 1, and the side of the injection molding layer 3 away from the slider 2 is attached to the surface of the line rail 1. When the slider 2 slides on the line rail 1, it passes through The injection layer 3 collides and rubs against the line rail 1, the surface of the injection layer 3 is smooth, the friction coefficient is small, but the contact area is large, so it can bear a large pressure, and is suitable for occasions requiring high load bearing.

Referring to FIG. 2 , the side of the slider 2 facing the line rail 1 is provided with a number of reinforcement grooves 21 . The reinforcement grooves 21 run through the entire slider 2 , and each reinforcement groove 21 is continuous with each other and forms a tooth shape. During injection molding, the material will be filled with reinforcement. In the groove 21, when the injection layer 3 is finally formed, the injection layer 3 will be embedded in the reinforcement groove 21, thereby greatly increasing the connection strength between the injection layer 3 and the slider 2, and reducing the detachment of the injection layer 3 from the slider 2. possible.

Referring to FIGS. 1 and 2 , the surfaces where the slider 2 and the top of the line rail 1 are matched are set as A area 22 , B area 23 and C area 24 , and the A area 22 and C area 24 are about the central axis of the line rail 1 along the vertical direction. Symmetrical arrangement, B area 23 is located between A area 22 and C area 24, A area 22 and C area 24 both have injection molding layer 3, and the injection layer 3 is against the top surface of the line rail 1, and there is no injection molding on B area 23 Layer 3, and there is a gap between the B area and the top of the line rail 1, thereby reducing the contact area between the slider 2 and the top of the line rail 1, so that the slider 2 and the top of the line rail 1 completely interfere with the injection layer 3 to reduce the The friction between the small slider 2 and the top of the line rail 1. The top surface of the line rail 1 is provided with a number of mounting screw holes 5 that penetrate the line rail 1 along the length direction of the line rail 1. The mounting screw holes 5 are arranged at equal intervals. When the slider 2 slides on the line rail 1, the B area 23 and the mounting screws The holes 5 are coincident. With this arrangement, since the A area 22 and the C area 24 are symmetrically distributed on both sides of the top of the wire rail 1, the bearing pressure can be evenly shared, and the bearing stability of the slider 2 is improved; and when the slider 2 slides on the wire rail 1 , the A area 22 and the C area 24 are always in contact with the outer edge of the installation screw hole 5, and will not be staggered with the installation screw hole 5, so as to ensure that the contact area between the slider 2 and the top of the line rail 1 remains unchanged, and further improve the bearing capacity of the slider 2. Stability and moving accuracy make the slider 2 have both high bearing capacity and high-precision moving ability.

Referring to FIG. 2 and FIG. 3 , the two sides of the trapezoidal protrusion 26 facing the side wall of the wire rail 1 are also provided with an injection molding layer 3 . At this time, most of the pressure on the slider 2 is distributed in the A area 22, the C area 24 and the trapezoidal protrusion 26 area, and the A area 22, the C area 24 and the trapezoidal protrusion 26 area all pass through the injection molding layer 3 and the line rail 1. contact, so as to ensure that the slider 2 can slide smoothly on the wire rail 1 .

Referring to FIG. 2, the injection molding layer 3 is made of acrylic glue, which has good fluidity, so that it can be quickly filled into the reinforcement groove 21; after curing, the acrylic glue has a small shrinkage rate and a high Therefore, the possibility of deformation of the injection molding layer 3 after the slider 2 is pressed can be reduced, and the sliding accuracy of the slider 2 on the line rail 1 can be ensured.

2 and 3, the top surface and the side surface of the line rail 1 are transitioned through the fillet 4, the radian of the fillet 4 is set to 120°, and a gap 41 is formed between the bottom of the fillet 4 and the side surface of the line rail 1, The corners of the inner wall of the slider 2 are in contact with the outer edge of the fillet 4, and the vacancy 41 can reduce the contact area of the side wall of the slider 2 near the fillet 4, which can effectively reduce the junction of the top surface and the side surface of the line rail 1 of the slider 2 The pressure is concentrated and the sliding smoothness of the slider 2 is improved.

The manufacturing method of the heavy-duty linear guide rail: first, take the raw material car out of the line rail 1 and the slider 2, then car out all the reinforcement grooves 21 on the inner wall of the slider 2, then put the slider 2 into the mold, and carry out the inner wall of the slider 2. In injection molding, the required injection molding layer 3 is formed on the inner wall of the slider 2 , and finally the outer surface of the injection molding layer 3 is finished.

The implementation principle of this embodiment is as follows: the operator installs the slider 2 on the line rail 1, and then installs the device to be driven on the slider 2. When the slider 2 slides on the line rail 1, most of the pressure is applied to On the A area 22, the C area 24 and the trapezoidal protrusion 26, and the A area 22, the C area 24 and the trapezoidal protrusion 26 are all in contact with the line rail 1 through the injection molding layer 3, and the friction coefficient between the injection molding layer 3 and the line rail 1 Small, so the slider 2 can still slide smoothly on the linear rail 1, and the D area 25 plays a guiding role for the movement of the slider 2 to ensure the movement accuracy of the slider 2. This kind of load-bearing linear guide rail is especially suitable for High pressure, low speed, high precision working environment.

The embodiments of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention should be covered in within the protection scope of the present invention.

Claims (7)

1. The utility model provides a bearing type linear guide, includes linear rail (1) and slide block (2) of connection on linear rail (1) that slide, its characterized in that: and an injection molding layer (3) is arranged between the sliding block (2) and the linear rail (1).

2. The load bearing linear guide of claim 1, wherein: the injection molding layer (3) is fixedly arranged on the sliding block (2), and the surface of the injection molding layer (3) departing from the sliding block (2) is in contact with the linear rail (1).

3. The load bearing linear guide of claim 2, wherein: one side of the sliding block (2) facing the linear rail (1) is provided with a plurality of reinforcing grooves (21), and the injection molding layer (3) is embedded in the reinforcing grooves (21).

4. Load-bearing linear guide according to claim 1 or 3, characterized in that: slider (2) and linear rail (1) top complex face are established to A district (22), B district (23) and C district (24), B district (23) are located between A district (22) and C district (24), A district (22) and C district (24) are contradicted through moulding plastics layer (3) and linear rail (1) top, B district (23) and linear rail (1) top have the clearance between.

5. The load bearing linear guide of claim 4, wherein: the top surface and the side surface of the linear rail (1) are transited through a fillet (4), and the radian of the fillet (4) is more than or equal to 90 degrees.

6. The load bearing linear guide of claim 5, wherein: the injection molding layer (3) is made of acrylic resin glue.

7. The load bearing linear guide of claim 4, wherein: the top surface of the linear rail (1) is provided with a plurality of mounting screw holes (5) penetrating through the linear rail (1) along the length direction of the linear rail (1).

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