Linear guide rail with two-row steel ball structure

Abstract

The linear guide rail of the two-row steel ball structure comprises a sliding rail and a sliding block, the sliding block comprises a sliding block body, steel ball grooves, a sliding groove, steel balls and an end cover assembly, the steel ball grooves are located in the two sides of the sliding groove, the steel balls are installed in the steel ball grooves and partially protrude out of groove openings of the steel ball grooves, and limiting faces are formed in the positions, close to the groove openings, of the inner wall faces of the steel ball grooves. A gap is formed between the limiting surface and the steel ball; the sliding block body is provided with a steel ball blocking piece, the steel ball blocking piece is provided with a mounting piece and a retaining piece, and the retaining piece extends to a notch of the steel ball groove. The retaining piece is matched with the limiting face to limit the steel balls from separating from the steel ball grooves. The steel balls are better limited in the steel ball grooves, the steel balls cannot fall off even if the sliding block is impacted by external force, and the use performance of the sliding block is better guaranteed; oil in the oil storage cotton enters the steel ball circulation loop through the oil way hole, the steel balls are lubricated, movement is smoother, the oil storage amount of the sliding block is increased, the later maintenance frequency is reduced, and the service life of the product is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of guide rails, and more specifically to a linear guide rail with two rows of steel balls. Background Art

[0002] Linear guides are used for high-precision or high-speed linear reciprocating motion. They can achieve high-precision linear motion under high load conditions. Linear guides include slide rails and sliders. Steel balls are set in the sliders. The steel balls are limited in the sliders. The steel balls reduce the friction between the sliders and the slide rails, achieving high-speed, smooth reciprocating linear motion.

[0003] In order to prevent the steel ball from falling in the slider, a steel wire is installed on the slider. The steel wire is located on the outside of the steel ball and acts as a limit for the steel ball. The linear guide rail in the existing technology still has the following problems:

[0004] 1. The common linear guide rails still have the problem that the steel balls are easy to fall off, especially in the extended slider. When the slider moves back and forth on the slide rail, the steel balls are still easy to fall off;

[0005] 2. There is no oil storage device inside the slider, and the oil filling frequency is high. Since the guide rail is generally installed inside the equipment, the subsequent maintenance cost is high;

[0006] 3. The slide rail needs to be processed with an air-avoiding groove (space for the steel wire to move), which increases production costs;

[0007] 4. The circulator structure is relatively complex, the mold cost is high, and the later quality control is relatively difficult;

[0008] 5. The arc length of the steel ball groove is short, the sealing is poor, and dust is easier to enter, which is not conducive to long-term use.

[0009] In view of the problems existing in the prior art, the applicant has improved the prior art and proposed the following technical solutions. Utility Model Content

[0010] In view of this, the utility model provides a linear guide rail with a two-row steel ball structure.

[0011] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a linear guide rail with two rows of steel balls, comprising: a slide rail and a slider, the slider comprising: a slider body, steel ball grooves arranged on both sides of the slider body, a slide groove arranged at the bottom of the slider body, steel balls and an end cover assembly, the steel ball grooves are located on both sides of the slide groove, the steel balls are installed in the steel ball grooves and partially protrude from the notch of the steel ball grooves,

[0012] The inner wall surface of the steel ball groove forms a limiting surface near the groove opening, and a gap is provided between the limiting surface and the steel ball;

[0013] The slider body is equipped with a steel ball baffle, which has a mounting plate and a retaining plate. The steel ball baffle is fixed to the slider body through the mounting plate, and the retaining plate extends to the notch of the steel ball groove; the distance D1 between the retaining plate and the limiting surface is smaller than the diameter D2 of the steel ball, and the retaining plate and the limiting surface cooperate to restrict the steel ball from escaping from the notch of the steel ball groove.

[0014] As a preferred solution of the utility model, the limiting surface is on the inner wall of the ball groove close to the first side of the notch, the retaining plate extends to the second side corresponding to the notch, and the limiting surface and the retaining plate are opposite to each other.

[0015] As a preferred solution of the utility model, the retaining piece is arranged to be inclined or arc-shaped corresponding to the side of the notch.

[0016] As a preferred solution of the utility model, the limiting surface is arranged in an arc shape, so that the first side of the slider body corresponding to the notch is arranged in a barb shape.

[0017] As a preferred solution of the utility model, the length of the arc formed by the limiting surface through the inner wall of the steel ball groove to the retaining sheet is greater than half the circumference of the steel ball.

[0018] As a preferred solution of the utility model, the slider body is provided with a steel ball channel, and the end cover assembly is assembled at the front end and the rear end of the slider body; a turning channel is formed between the end cover assembly and the slider body;

[0019] The steel ball groove, the steel ball channel and the turning channel are connected to form a steel ball circulation loop, and the steel balls circulate and rotate in the steel ball circulation loop.

[0020] As a preferred solution of the utility model, the end cover assembly includes: an end cover, oil storage cotton and an oil scraper;

[0021] The end covers are fixedly mounted on both ends of the slider body, and the oil storage cotton is fixed between the end covers and the oil scraper.

[0022] As a preferred solution of the utility model, the end cover is provided with an oil passage hole, and the oil passage hole is connected to the steering channel.

[0023] As a preferred solution of the utility model, an oil storage tank is arranged on the side of the end cover facing the oil storage cotton, and the oil storage tank is connected between the two oil passage holes.

[0024] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial technical effects:

[0025] 1. The utility model sets the notch of the steel ball groove into a barb shape, which cooperates with the retaining piece of the steel ball baffle to better limit the steel ball in the steel ball groove. Even if the slider is impacted by external force, the steel ball will not fall off, and the performance of the slider is more guaranteed;

[0026] 2. The utility model is provided with end cover assemblies at both ends of the slider body. The oil in the oil storage cotton enters the steel ball circulation loop through the oil passage hole, lubricates the steel ball and moves more smoothly. The oil in the oil storage cotton can also be stored in the oil storage tank, which greatly increases the oil storage capacity of the slider, reduces the frequency of later maintenance, and greatly improves the product life.

[0027] 3. The utility model adopts the steel ball baffle and the limit surface to limit the steel ball, replacing the traditional wire retainer, eliminating the step of machining the steel wire groove on the slide rail, increasing the processing efficiency of the slide rail ball track, improving the product straight pass rate, and greatly reducing the production cost;

[0028] 4. The utility model forms a turning channel between the end cover and the slider body, has a compact structure, and a simple assembly method. The slider body and the end cover are used to locate the activity space of the steel ball, which has better reliability and accuracy.

[0029] 5. The steel ball wrapping arc length of the utility model is longer and the gap is smaller, which not only increases the sealing of the slider, but also indirectly increases the service life of the slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the structure of a linear guide rail with two rows of steel balls in the utility model;

[0032] Figure 2 It is a schematic diagram of a slider in a linear guide rail with two rows of steel balls of the utility model;

[0033] Figure 3 It is an exploded view of the linear guide rail with two rows of steel balls of the utility model;

[0034] Figure 4 It is a longitudinal cross-sectional schematic diagram of a linear guide rail with two rows of steel balls according to the utility model;

[0035] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0036] Figure 6 It is a schematic cross-sectional view of a linear guide rail with two rows of steel balls according to the utility model.

[0037] Description of reference numerals:

[0038] Slide rail 00; ball track 01; slider 100; slider body 200; gap 201; steel ball groove 210; notch 211; limit surface 212; slide groove 220; steel ball channel 240; steering channel 250; steel ball 300; steel ball baffle 400; mounting plate 410; retaining plate 420; side 421; end cover assembly 500; end cover 510; oil passage hole 511; oil storage tank 512; oil storage cotton 520; oil scraper 530. DETAILED DESCRIPTION

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0040] A linear guide with two rows of steel balls, see Figure 1-6 As shown, it includes: a slide rail 00 and a slider 100 , the slide rail 00 is linear, the slider 100 is installed on the slide rail 00 , and the slider 100 can move back and forth along the slide rail 00 in a straight line.

[0041] The slider 100 includes a slider body 200 , a steel ball 300 , a steel ball stopper 400 and an end cover assembly 500 .

[0042] The slider body 200 can be made of high-hardness metal. The slider body 200 is installed on the slide rail 00. When used in mechanical equipment, other mechanisms of the mechanical equipment such as a mounting plate, a mounting bracket, etc. can be installed on the upper surface of the slider body 200.

[0043] The slider body 200 is provided with a steel ball groove 210, and the steel ball 300 is installed in the steel ball groove 210 and partially protrudes from the steel ball groove 210. The slider 100 and the slide rail 00 are assisted by the steel ball 300 to achieve a stable and smooth movement effect;

[0044] The steel ball baffle 400 is installed on the slider body 200, and cooperates with the slider body 200 to limit the steel ball 300 in the steel ball groove 210. The steel ball baffle 400 replaces the steel wire structure in the traditional slider, which is easier to install. There is no need to set an avoidance space on the guide rail 00, the process is simpler, and the production cost is reduced.

[0045] There are two sets of end cap assemblies 500, which are respectively installed on the slider body 200 at Figure 2 At both ends in the X direction, the end cover assembly 500 effectively shields against dust.

[0046] Specifically, the slider body 200 is provided with steel ball grooves 210 on both sides, and a group of steel balls 300 are respectively installed in the steel ball grooves 210 on each side, and each group of steel balls 300 contains a plurality of steel balls; the slider body 200 is recessed from one surface to the other opposite surface to form a slide groove 220, and the slide rail 00 is installed in the slide groove 220. After assembly, the slide rail 00 is stuck in the slide groove 220, and the steel balls 300 protrude from the notches 211 of the steel ball grooves 210 and act on the side of the slide rail 00, assisting the slider 100 to move smoothly along the slide rail 00.

[0047] like Figure 4-5 As shown, the longitudinal cross-section of the steel ball groove 210 is substantially C-shaped, and the steel ball groove 210 extends along the length direction of the slider body 200, that is, Figure 2 The steel ball groove 210 extends in the X direction and passes through both ends of the slider body 200 in the X direction. The steel ball groove 210 is connected with the slide groove 220 through the notch 211. The inner wall surface of the steel ball groove 210 forms a limiting surface 212 near the notch 211. A gap 201 is provided between the limiting surface 212 and the steel ball 300.

[0048] The slider body 200 is equipped with a steel ball blocking piece 400, which has a mounting piece 410 and a retaining piece 420. The steel ball blocking piece 400 is fixed to the slider body 200 through the mounting piece 410, and the retaining piece 420 extends to the notch 211 of the steel ball groove 210; the distance D1 between the retaining piece 420 and the limiting surface 212 is smaller than the diameter D2 of the steel ball 300, and the retaining piece 420 and the limiting surface 212 cooperate to restrict the steel ball 300 from escaping from the notch 211 of the steel ball groove 210;

[0049] The mounting piece 410 of the steel ball baffle 400 can be fixed to the bottom of the slider body 200 by screws or by welding.

[0050] Furthermore, the limiting surface 212 is located on the first side (i.e. Figure 5 The retaining piece 420 extends to the second side corresponding to the notch 211 (i.e. Figure 5 After the steel ball 300 is installed in the steel ball groove 210, the steel ball 300 is partially in contact with the inner wall of the steel ball groove 210. The limiting surface 212 is a part of the inner wall of the steel ball groove 210. When the slider 100 is in a stationary state, Figure 4 As shown, the steel ball 300 does not contact the limiting surface 212. Since the distance D1 between the retaining sheet 420 and the limiting surface 212 is smaller than the diameter D2 of the steel ball 300, the steel ball 300 cannot be separated from the slider body 200 from the notch 211, thus solving the problem of the steel ball 300 easily falling off in the traditional slider;

[0051] Continue as Figure 5 As shown, ball tracks 01 cooperating with the steel ball 300 are arranged on both sides of the slide rail 00, and the steel ball 300 is restricted between the steel ball groove 210 and the ball track 01. The limiting surface 212 does not contact the steel ball 300. The limiting surface 212 is connected to one side of the groove 211. The limiting surface 212 is arc-shaped, so that the first side of the slider body 200 corresponding to the groove 211 is arranged in a barb shape, which can effectively prevent the steel ball 300 from escaping from the steel ball groove 210.

[0052] Furthermore, the steel ball baffle 400 is made of high-hardness metal, the mounting plate 410 and the retaining plate 420 are bent into an L shape, the steel ball baffle 400 extends along the length direction of the slider body 200, and the mounting plate 410 is installed at the bottom of the slider body 200 (corresponding to Figure 2 The upper surface of the orientation), the retaining sheet 420 is bent and extended to a position corresponding to the slot 211, and the side edge 211a of the retaining sheet 420 corresponding to the slot 211 is inclined or arc-shaped to better cooperate with the steel ball 300.

[0053] Furthermore, the arc length formed by the limiting surface 212 through the inner wall of the steel ball groove 210 to the retaining plate 420 is greater than half the circumference of the steel ball 300. The arc length of the steel ball 300 is longer, and the shielding of the end cover assembly 500 makes the dustproof effect of the slider 100 better.

[0054] Continue as Figure 5 As shown, after the slider 100 is assembled on the slide rail 00, the gap between the side surface of the slide rail 00 and the inner side surface of the slider 00 is smaller than the gap between the slide rail of the transmission guide rail and the slider, and the dustproof effect is better.

[0055] In one embodiment, if Figure 3 and Figure 6 As shown, the slider body 200 is provided with a steel ball channel 240, and the end cover assembly 500 is assembled at the front end and the rear end of the slider body 200; a turning channel 250 is formed between the end cover assembly 500 and the slider body 200; the steel ball groove 210, the steel ball channel 240 and the turning channel 250 are connected to form a steel ball circulation loop, and the steel ball 300 circulates in the steel ball circulation loop.

[0056] Furthermore, the end cover assembly 500 includes: an end cover 510, oil storage cotton 520 and an oil scraper 530; the end cover 510 and the oil scraper 530 are fixedly mounted on both ends of the slider body 200 by screws, and the oil storage cotton 520 is fixed between the end cover 510 and the oil scraper 530.

[0057] Furthermore, the end cover 510 is provided with an oil passage hole 511, which is connected to the steering channel 250. The oil in the oil storage cotton 520 enters the steering channel 250 through the oil passage hole 511. When the steel ball 300 moves through the steering channel 250, it takes away the oil, so that the steel ball 300 rotates more smoothly.

[0058] An oil passage hole 511 is respectively provided corresponding to each steel ball circulation loop on the slider body 200 , and an oil storage tank 512 is provided on one side of the end cover 510 facing the oil storage cotton 520 , and the oil storage tank 512 is connected between the two oil passage holes 511 .

[0059] Continue as Figure 6 As shown, when the slider body 200 moves linearly on the slide rail 00, that is, Figure 6 As shown in the figure, the oil in the oil storage cotton 520 moves up and down under the impact force of the reciprocating motion of the slider 100, and enters the oil passage hole 511 on the end cover 510 and the oil storage tank 512. The oil in the oil storage tank 512 can be gradually sent to the steel ball circulation loop through the oil passage hole 511, which greatly increases the oil storage capacity of the slider 100, reduces the frequency of later maintenance, and greatly improves the product life.

[0060] The working principle of the utility model is as follows: when installing the steel ball baffle 400, first use a clamp to fix the steel ball baffle 400 and the slider body 200, and then weld the steel ball baffle 400 and the slider body 200 firmly, fix the oil scraper 530 on the end cover 510, and tighten it with screws, the oil scraper 530 presses the oil storage cotton 520, and is installed at both ends of the slider body 200 through the end cover assembly 500, effectively improving the dustproof effect; the oil in the oil storage cotton 520 is injected into the steel ball circulation loop of the steel ball 300 through the oil path hole 511 on the end cover 510 under the impact force of the reciprocating motion of the slider 100. After the steel ball 300 is installed in the steel ball groove 210, the slider body 200 forms a barb shape through the limiting surface 212 of the steel ball groove 210, and cooperates with the retaining sheet 420 of the steel ball baffle 400 to limit the steel ball 300, increase the stability of the steel ball 300, and make it less likely to fall off; the oil storage cotton 520 is installed to cover the oil storage groove 512 of the end cover 510, and the oil enters the steering channel 250 through the oil passage hole 511 to lubricate the steel ball 300. After the installation is completed, the slider 100 moves smoothly on the slide rail 00. The product has the characteristics of low friction resistance, high operation accuracy, and good operation reliability. The slider 100 will not cause the steel ball to fall off when it leaves the slide rail 00.

[0061] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A linear guide with two rows of steel balls. include: A slide rail (00) and a slider (100), wherein the slider (100) comprises: a slider body (200), steel ball grooves (210) arranged on both sides of the slider body (200), a slide groove (220) arranged at the bottom of the slider body (200), steel balls (300) and an end cover assembly (500), wherein the steel ball grooves (210) are located on both sides of the slide groove (220), and the steel balls (300) are installed in the steel ball grooves (210) and partially protrude from the notches (211) of the steel ball grooves (210), and wherein: A position of the inner wall surface of the steel ball groove (210) close to the notch (211) forms a limiting surface (212), and a gap (201) is provided between the limiting surface (212) and the steel ball (300); The slider body (200) is provided with a steel ball blocking piece (400), the steel ball blocking piece (400) having a mounting piece (410) and a retaining piece (420), the steel ball blocking piece (400) being fixed to the slider body (200) via the mounting piece (410), the retaining piece (420) extending to the notch (211) of the steel ball groove (210); the distance D1 between the retaining piece (420) and the limiting surface (212) is smaller than the diameter D2 of the steel ball (300), the retaining piece (420) and the limiting surface (212) cooperate to restrict the steel ball (300) from escaping from the notch (211) of the steel ball groove (210).

2. A linear guide rail with two rows of steel balls according to claim 1, Features: The limiting surface (212) is located on a first side of the inner wall of the steel ball groove (210) close to the notch (211), the retaining sheet (420) extends to a second side corresponding to the notch (211), and the limiting surface (212) and the retaining sheet (420) are opposite to each other.

3. A linear guide rail with two rows of steel balls according to claim 2, Features: The retaining piece (420) is arranged in an inclined or arc-shaped manner corresponding to the side of the notch (211).

4. A linear guide rail with two rows of steel balls according to claim 1, Features: The limiting surface (212) is arranged in an arc shape, so that the first side of the slider body (200) corresponding to the notch (211) is arranged in a barb shape.

5. A linear guide rail with two rows of steel balls according to claim 1, Features: The length of the arc formed by the limiting surface (212) through the inner wall of the steel ball groove (210) to the retaining plate (420) is greater than half the circumference of the steel ball (300).

6. A linear guide rail with two rows of steel balls according to any one of claims 1 to 5, Features: The slider body (200) is provided with a steel ball channel (240), and the end cover assembly (500) is assembled at the front end and the rear end of the slider body (200); a turning channel (250) is formed between the end cover assembly (500) and the slider body (200); The steel ball groove (210), the steel ball channel (240) and the turning channel (250) are connected to form a steel ball circulation loop, and the steel balls (300) circulate and rotate in the steel ball circulation loop.

7. A linear guide rail with two rows of steel balls according to claim 6, Features: The end cover assembly (500) comprises: an end cover (510), oil storage cotton (520) and an oil scraper (530); The end covers (510) are fixedly mounted on both ends of the slider body (200), and the oil storage cotton (520) is fixed between the end covers (510) and the oil scraper (530).

8. A linear guide rail with two rows of steel balls according to claim 7, Features: The end cover (510) is provided with an oil passage hole (511), and the oil passage hole (511) is connected to the steering channel (250).

9. A linear guide rail with two rows of steel balls according to claim 8, Features: An oil storage tank (512) is provided on one side of the end cover (510) facing the oil storage cotton (520), and the oil storage tank (512) is connected between the two oil passage holes (511).

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