Linear guide rail smooth in operation

Abstract

The utility model discloses a linear guide rail capable of running smoothly, which comprises a sliding block and a track, the sliding block slides on the track, and the linear guide rail is characterized in that the sliding block is formed by splicing an upper sliding block and a lower sliding block; a lower circulation path channel is formed in the lower sliding block, an upper circulation path channel opposite to the lower circulation path channel is formed in the upper sliding block, and the lower circulation path channel and the upper circulation path channel jointly form a circulation path channel for balls to run. According to the linear guide rail capable of running smoothly, time-consuming and labor-consuming assembling retainers are not needed any more, the assembling time is shortened, circulation path channels are integrally designed, segment differences of splicing do not exist, and the movement stability of the balls is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of linear guide rails, and particularly relates to a linear guide rail with smooth operation. BACKGROUND

[0002] Generally, a linear guide rail mainly utilizes a track, a sliding block and two end covers to jointly form a circulating path channel for the operation of multiple balls. However, the linear guide rail mainly has the following two defects:

[0003] Firstly, when workers assemble L-shaped hooks, they need to first bend them open and then push them into grooves, which is time-consuming and laborious, and causes hand pain and low assembly efficiency. Figure 1 And Figure 2 At present, the prevention of ball drop relies on L-shaped retainers. Generally, a linear guide rail utilizes a retainer composed of two L-shaped hooks to prevent balls from dropping. The installation process is as follows: one end of the hook is first placed, and then the other end is bent open by an angle and installed into the groove of the opposite end cover. When assembling guide rails in batches, workers need to repeatedly bend the hooks for a long time, which causes hand pain and reduces assembly efficiency.

[0004] Secondly, there is a step difference in the non-flat connection of the circulating path channel, which causes ball jamming or unsmooth operation. Figure 3 The load path channel formed between the track and the sliding block is a Gothic arc cross section, and the backflow path channel provided by each end cover is a circular arc cross section. Therefore, there is a discontinuous step difference at the connection of the two, which affects the operation of the balls and causes the balls to easily jam or collide when passing through the step difference, thereby causing unsmooth backflow of the balls. SUMMARY

[0005] The utility model aims at solving at least one of the technical problems in the prior art.

[0006] Therefore, the utility model provides a linear guide rail with smooth operation, which no longer needs to consume time and labor to assemble retainers, reduces assembly time, and integrally designs the circulating path channel, so that there is no step difference in splicing, thereby ensuring the stability of ball movement.

[0007] The linear guide rail with smooth operation according to the utility model embodiment comprises a sliding block and a track, the sliding block slides on the track, and is characterized in that the sliding block is assembled by an upper sliding block and a lower sliding block; the lower sliding block is internally provided with a lower circulating path channel, the upper sliding block is internally provided with an upper circulating path channel opposite to the lower circulating path channel, and the lower circulating path channel and the upper circulating path channel jointly form a circulating path channel for the operation of balls.

[0008] The utility model discloses beneficial effect is, the utility model discloses through adding the baffle on the lower sliding block, this baffle not only can be used to prevent the ball from falling out from the circulation path channel, but can be used to replace the original technology's retainer structure, no longer needs the worker to assemble the retainer of time -consuming and labor -intensive, effectively solve the problem of worker's manual pain, the low assembly efficiency, simultaneously, the baffle and the bottom plate on the lower sliding block are integral type forming structure, not only strengthen the structural strength of baffle, still reduce the component quantity of lower sliding block, through the integral design of circulation path channel, make the ball always be smooth on the whole circulation movement's path, there is no splicing's section difference, therefore, the motion stability can be guaranteed, and there is no jitter.

[0009] According to an embodiment of the utility model, the lower sliding block includes two bottom plates and a positioning plate connecting the two bottom plates, and the lower circulation path channel is arranged on the bottom plate.

[0010] According to an embodiment of the utility model, the positioning plate is provided with two positioning plates arranged at both ends of the lower sliding block along the running direction of the track.

[0011] According to an embodiment of the utility model, the positioning plate is in the shape of П, and the positioning plate includes a crossbeam and a stand column, the stand column is formed by bending the two ends of the crossbeam, and the two bottom plates are integrally connected with the stand column.

[0012] According to an embodiment of the utility model, the lower sliding block is further provided with a baffle, the baffle is arranged on the inner side of the bottom plate, and the two ends of the baffle are respectively connected to the bottom plate near the positioning plate and integrally formed with the bottom plate.

[0013] According to an embodiment of the utility model, the lower circulation path channel is composed of four arc surfaces integrally processed, the four arc surfaces are a first arc surface, a second arc surface, a third arc surface and a fourth arc surface connected in sequence, the upper circulation path channel is composed of four arc surfaces integrally processed, the four arc surfaces are a fifth arc surface, a sixth arc surface, a seventh arc surface and an eighth arc surface connected in sequence, the first arc surface corresponds to the fifth arc surface, the second arc surface corresponds to the sixth arc surface, the third arc surface corresponds to the seventh arc surface, and the fourth arc surface corresponds to the eighth arc surface.

[0014] According to an embodiment of the utility model, the third arc surface and the seventh arc surface form a non-load path channel, and the second arc surface and the sixth arc surface, and the fourth arc surface and the eighth arc surface form a reflux circulation path channel; the non-load path channel and the reflux circulation path channel are both circular arc channels.

[0015] According to one embodiment of the utility model, both sides of the track are respectively provided with track grooves arranged along the length direction, two arc surfaces are integrally processed on the upper and lower sides of the track groove, and the two arc surfaces are a first track arc surface and a second track arc surface.

[0016] According to one embodiment of the utility model, a groove accommodating the baffle is arranged between the first track arc surface and the second track arc surface on the two sides.

[0017] According to one embodiment of the utility model, the lower sliding block is provided with a first through hole and a second through hole, and the lower sliding block is provided with a first threaded hole and a second threaded hole matched with the first through hole and the second through hole; wherein the second through hole is arranged on the positioning plate, and the second threaded hole is arranged on the positioning groove.

[0018] According to one embodiment of the utility model, the radius of the gothic load path channel is , and the diameter of the ball is , then and have the following relationship: .

[0019] Other features and advantages of the utility model will be described in the subsequent specification, and some of them will become apparent from the specification, or will be understood by implementing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structure specially pointed out in the specification and the drawings.

[0020] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the drawings are described as follows. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the application, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0022] Figure 1 is a schematic diagram of the installation process of the retainer in the linear guide rail of the prior art;

[0023] Figure 2 is a schematic diagram of the finished product after the retainer is installed in the linear guide rail of the prior art;

[0024] Figure 3is a schematic view of the segment difference existing in the connection of the circulating path groove of the prior art linear guide rail;

[0025] Figures 1-3 The reference signs in are: a, holder; b, slider groove; c, rotating plate groove; d, segment difference existing in the connection.

[0026] Figure 4 is a structure schematic view of the linear guide rail of the utility model running smoothly;

[0027] Figure 5 is a side view of the track in the utility model;

[0028] Figure 6 is a structure schematic view of the lower slider in the utility model Figure 1 ;

[0029] Figure 7 is a structure schematic view of the lower slider in the utility model Figure 2 ;

[0030] Figure 8 is a structure schematic view of the lower slider in the utility model Figure 3 ;

[0031] Figure 9 is a top view of the lower slider in the utility model;

[0032] Figure 10 is Figure 9 a sectional view at A-A in;

[0033] Figure 11 is a structure schematic view of the upper slider in the utility model Figure 1 ;

[0034] Figure 12 is a structure schematic view of the upper slider in the utility model Figure 2 ;

[0035] Figure 13 is a structure schematic view of the upper slider in the utility model Figure 3 ;

[0036] Figure 14 is a bottom view of the upper slider in the utility model;

[0037] Figure 15 is Figure 14 a sectional view at B-B in;

[0038] Figure 16 is a sectional view of the linear guide rail of the utility model running smoothly;

[0039] Figure 17 is Figure 16 a local enlarged view at C in.

[0040] Figures 4-17 the reference numerals in the figure are as follows: 1, upper slide block; 31, first threaded hole; 32, second threaded hole; 33, top plate; 35, positioning groove; 351, second plane; 36, upper circulating path channel; 361, fifth arc surface; 362, sixth arc surface; 363, seventh arc surface; 364, eighth arc surface;

[0041] 2, lower slide block; 21, first through hole; 22, second through hole; 23, bottom plate; 231, upper plane of bottom plate; 24, baffle; 241, long baffle; 242, short baffle; 243, upper plane of baffle; 244, lower plane of baffle; 25, positioning plate; 251, first plane; 252, cross beam; 253, stand column; 26, lower circulating path channel; 261, first arc surface; 262, second arc surface; 263, third arc surface; 264, fourth arc surface;

[0042] 3, track; 11, first track arc surface; 12, second track arc surface;

[0043] 4, sealing element; 5, ball; 8, dotted line. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] The running smooth straight linear guide rail is specifically described below with reference to the drawings.

[0048] See Figure 4 The running smooth straight linear guide rail of the utility model, including slider, track 3 and sealing piece 4, slider slides on track 3, slider is assembled by upper slider 1 and lower slider 2, two sealing pieces 4 are arranged at the front and rear ends of slider respectively, lower slider 2 is equipped with lower circulation path channel 26, upper slider 1 is equipped with upper circulation path channel 36 opposite to lower circulation path channel 26, and lower circulation path channel 26 and upper circulation path channel 36 jointly form circulation path channel for the operation of ball 5.

[0049] See Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 And Figure 10 Lower slider 2 includes bottom plate 23 and positioning plate 25, specifically, lower slider 2 includes two bottom plates 23 and positioning plate 25 connected with the two bottom plates 23, and lower circulation path channel 26 is arranged on bottom plate 23.Positioning plate 25 is provided with two, which are arranged at the two ends of lower slider 2 along the running direction of track 3.

[0050] Lower slider 2 is further provided with baffle 24, baffle 24 is arranged on the inner side of bottom plate 23, and baffle 24 is connected at the two ends to bottom plate 23 near positioning plate 25, and is integrally formed with bottom plate 23.

[0051] See Figure 5 Track 3 is provided with track groove along the length direction of track 3 on the two sides respectively, two arc surfaces are integrally machined on the upper and lower sides of track groove, the two arc surfaces are first track arc surface 11 and second track arc surface 12, and the groove for accommodating baffle 24 is arranged between the first track arc surface 11 and the second track arc surface 12 on the two sides. Among them, the groove height of track groove is L1.

[0052] See Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 And Figure 15 Upper slider 1 includes top plate 33 and positioning groove 35, specifically, upper slider 1 includes top plate 33 matched with bottom plate 23, and positioning groove 35 matched with positioning plate 25, and upper circulation path channel 36 is arranged on top plate 33. Positioning groove 35 is arranged on top plate 33, and positioning groove 35 is symmetrical about the width center line direction of top plate 33. The number of positioning groove 35 is two, and the two positioning grooves 35 are symmetrical about the length center line direction of top plate 33. Four second screw holes 32 are arranged on the two positioning grooves 35.

[0053] The lower circulation path groove 26 and the upper circulation path groove 36 are always smooth, and when machining, the cutter feeds along the up-down direction of the slider, so a very long cutter is not needed; when molding, the up-down direction is demolded, so the integrated design circulation path groove is always smooth.

[0054] The integrated design circulation path groove does not jam the ball, and the rotation movement path of the ball 5 is shown by the dashed line 8 in Figure 9 The design ensures that the second arc surface 262 and the third arc surface 263, the first arc surface 261 are always smooth, and the fourth arc surface 264 and the third arc surface 263, the first arc surface 261 are always smooth, and the entire trajectory dashed line 8 is always smooth, so the ball 5 runs smoothly in the smooth groove.

[0055] The number of the lower circulation path groove 26 is two, and the two lower circulation path grooves 26 are symmetric about the width center line direction of the bottom plate 23.

[0056] The lower circulation path groove 26 is composed of four arc surfaces machined integrally, which can realize smooth transition and eliminate the problem of joint gap between the arc surfaces of the circulation path groove. The four arc surfaces are the first arc surface 261, the second arc surface 262, the third arc surface 263, and the fourth arc surface 264 connected in sequence. The first arc surface 261 is arranged along the length direction of the bottom plate 23, the second arc surface 262 is arranged along the width direction of the bottom plate 23, the third arc surface 263 is arranged along the length direction of the bottom plate 23, the fourth arc surface 264 is arranged along the width direction of the bottom plate 23, and the first arc surface 261 is located inside the third arc surface 263.

[0057] The cross section of the first arc surface 261 in the lower circulation path groove 26 is an incomplete Gothic eccentric circular arc. The cross section of the second arc surface 262 is a circular arc. The cross section of the third arc surface 263 is a circular arc. The cross section of the fourth arc surface 264 is a circular arc.

[0058] The lower sliding block 2 is provided with a first through hole 21 and a second through hole 22, and the upper sliding block 1 is provided with a first threaded hole 31 and a second threaded hole 32 matched with the first through hole 21 and the second through hole 22. The second through hole 22 is arranged on the positioning plate 25, and the second threaded hole 32 is arranged on the positioning groove 35. Specifically, the bottom plate 23 is provided with four first through holes 21 corresponding to the four first threaded holes 31 arranged on the upper sliding block 1, for mounting and fixing the upper sliding block 1 and the lower sliding block 2. Two positioning plates 25 are arranged on the front and rear sides of the upper surface of the bottom plate 23, and the two positioning plates 25 are symmetric about the length center line direction of the bottom plate 23. The positioning plate 25 is in the shape of П, and includes a cross beam 252 and a stand column 253. The stand column 253 is formed by bending the two ends of the cross beam 252, and the two bottom plates 23 are integrally connected with the stand column 253. Specifically, the positioning plate 25 includes one cross beam 252 and two stand columns 253, which are integrally formed. The two stand columns 253 are symmetrically arranged on the two sides of the cross beam 252. The cross beam 252 of the two positioning plates 25 is provided with four second through holes 22 corresponding to the four second threaded holes 32 arranged on the upper sliding block 1, for mounting and fixing the upper sliding block 1 and the lower sliding block 2.

[0059] See Figure 10 The baffle 24 includes a baffle upper plane 243 and a baffle lower plane 244. The height of the baffle 24 is H, that is, the distance between the baffle upper plane 243 and the baffle lower plane 244 is H. The baffle upper plane 243 and the baffle lower plane 244 are symmetric about the bottom plate upper plane 231 of the bottom plate 23. The reason for this design is that Figure 17 The L size represents the distance between the contact points of the ball 5 and the two side channels. Therefore, when the retention rate L / D≥90% is met, D is the diameter of the ball 5, and the ball 5 can be prevented from falling off, thereby reflecting the retaining effect of the baffle 24.

[0060] The lower circulation path groove 26 and the upper circulation path groove 36 are combined to form a circulation path groove for the ball 5 to run in, and the lower sliding block 2 further comprises a baffle 24 for preventing the ball 5 from falling out of the circulation path groove, the baffle 24 being integrally formed with the bottom plate 23. The baffle 24 is symmetric about the length center line direction of the bottom plate 23. The number of the baffle 24 is two, and the two baffles 24 are symmetric about the width center line direction of the bottom plate 23. The baffle 24 is located below the cross beam 252 of the positioning plate 25, and the baffle 24 is in the shape of П, comprising a long baffle strip 241 and two short baffle strips 242, which are integrally formed. The two short baffle strips 242 are symmetrically arranged on both sides of the long baffle strip 241, and the baffle 24 is symmetrically designed about the upper surface of the bottom plate 23 in the width direction, so as to better ensure the function of preventing the ball 5 from falling off. Specifically, the end of the short baffle strip 242 of the baffle 24 is connected with the inner wall of the stand column 253 of the positioning plate 25.

[0061] In addition, the baffle 24 is designed in an integral manner with the bottom plate 23, so that workers no longer need to repeatedly bend the clamping hooks of the retainer, and the assembly efficiency can be improved. The lower sliding block 2 is symmetrically designed in front and back and left and right directions. The baffle 24 replaces the original retainer structure, and the baffle 24 is integrally formed with the bottom plate 23, thereby reducing the number of components.

[0062] The positioning plate 25 on the lower sliding block 2 corresponds to the positioning groove 35 on the upper sliding block 1, and the positioning plate 25 and the positioning groove 35 rely on the cooperation of the first plane 251 and the second plane 351 to facilitate the positioning and installation of the upper sliding block 1 and the lower sliding block 2. Specifically, in the assembly process, the first plane 251 and the second plane 351 are tightly attached, thereby limiting the deviation of the upper sliding block 1 and the lower sliding block 2 in the axial direction.

[0063] The number of the upper circulation path groove 36 is two, and the two upper circulation path grooves 36 are symmetric about the width center line direction of the top plate 33.

[0064] The upper circulation path groove 36 is composed of four arc surfaces integrally processed, and the four arc surfaces are sequentially connected in a head-tail manner, i.e., the fifth arc surface 361, the sixth arc surface 362, the seventh arc surface 363, and the eighth arc surface 364. The fifth arc surface 361 is arranged along the length direction of the top plate 33, the sixth arc surface 362 is arranged along the width direction of the top plate 33, the seventh arc surface 363 is arranged along the length direction of the top plate 33, the eighth arc surface 364 is arranged along the width direction of the top plate 33, and the fifth arc surface 361 is located on the inner side of the seventh arc surface 363.

[0065] The first arc surface 261 corresponds to the fifth arc surface 361, the second arc surface 262 corresponds to the sixth arc surface 362, the third arc surface 263 corresponds to the seventh arc surface 363, and the fourth arc surface 264 corresponds to the eighth arc surface 364.

[0066] The radius of the Gothic load path channel is The diameter of the ball 5 is Then The relationship between .

[0067] See Figure 16 The cross-sectional view of the assembled lower slider 2 and upper slider 1 introduces the circulation path channel. As shown in the cross-sectional view, the first arc surface 261, the second arc surface 262, the third arc surface 263, and the fourth arc surface 264 form an integrated design channel, and the fifth arc surface 361, the sixth arc surface 362, the seventh arc surface 363, and the eighth arc surface 364 also form an integrated design channel; the second arc surface 262, the third arc surface 263, the fourth arc surface 264, the sixth arc surface 362, the seventh arc surface 363, and the eighth arc surface 364 form an integrated design of the backflow circulation path channel.

[0068] The third arc surface 263 and the seventh arc surface 363 form a non-load path channel, and the cross section is a complete circular arc. The second arc surface 262 and the sixth arc surface 362, and the fourth arc surface 264 and the eighth arc surface 364 form a backflow circulation path channel; both the non-load path channel and the backflow circulation path channel are circular arc channels.

[0069] The first arc surface 261, the fifth arc surface 361, and the track channel form a load circulation path channel. Specifically, the first arc surface 261, the fifth arc surface 361, the first track arc surface 11, and the second track arc surface 12 form an eccentric integrated design Gothic load path channel. The Gothic load path channel has four-point contact with the ball 5, which can withstand greater load.

[0070] The lower circulation path channel 26 and the upper circulation path channel 36 are respectively integrated designed, and the backflow circulation path channel and the load circulation path channel of the circulation path channel are integrated designed, which greatly improves the stability of the ball 5 running.

[0071] Among them, the circulation path channel is the combination of the backflow circulation path channel and the load circulation path channel.

[0072] The ball 5 in the backflow circulation path channel is not under force when rolling.

[0073] The ball 5 in the load circulation path channel will bear load when rolling, and the load is derived from the load transmission of the guide rail to each ball 5.

[0074] The upper slider 1 and the lower slider 2 are the same, and the lower slider 2 is described as follows: Figure 9 ​As shown, the dashed line 8 is a trajectory line simulating the movement of the ball 5, which is always smooth in the entire cyclic movement path, and there is no joint gap, so the movement stability can be guaranteed, and shaking will not occur.

[0075] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A linear guide rail that runs smoothly, comprising a slider and a rail (3) on which the slider slides, characterized in that, The slider is assembled by an upper slider (1) and a lower slider (2); The lower slider (2) is provided with a lower circulating path channel (26), and the upper slider (1) is provided with an upper circulating path channel (36) opposite to the lower circulating path channel (26), and the lower circulating path channel (26) and the upper circulating path channel (36) jointly form a circulating path channel for the running of the ball (5).

2. The smooth running linear guide rail according to claim 1, characterized in that, The lower slider (2) comprises two bottom plates (23) and a positioning plate (25) connecting the two bottom plates (23), and the lower circulating path channel (26) is arranged on the bottom plate (23). The upper slider (1) comprises a top plate (33) matched with the bottom plate (23), and a positioning groove (35) matched with the positioning plate (25), and the upper circulating path channel (36) is arranged on the top plate (33).

3. The smooth running linear guide rail according to claim 2, wherein The positioning plate (25) is provided with two positioning plates (25) arranged at two ends of the lower slider (2) along the running direction of the track (3).

4. The smooth running linear guide rail according to claim 3, characterized in that, The positioning plate (25) is in the shape of П, and the positioning plate (25) comprises a cross beam (252) and a stand column (253), the stand column (253) is formed by bending the two ends of the cross beam (252), and the two bottom plates (23) are integrally connected with the stand column (253).

5. The smooth running linear guide rail according to claim 4, wherein The lower slider (2) is further provided with a baffle (24), the baffle (24) is arranged on the inner side of the bottom plate (23), and the two ends of the baffle (24) are respectively connected to the bottom plate (23) near the positioning plate (25) and integrally formed with the bottom plate (23).

6. The smooth-running linear guide rail according to claim 1 or 2, characterized by The lower circulating path channel (26) is composed of four arc surfaces integrally processed, and the four arc surfaces are a first arc surface (261), a second arc surface (262), a third arc surface (263) and a fourth arc surface (264) connected in sequence. The upper circulating path channel (36) is composed of four arc surfaces integrally processed, and the four arc surfaces are a fifth arc surface (361), a sixth arc surface (362), a seventh arc surface (363) and an eighth arc surface (364) connected in sequence. The first arc surface (261) corresponds to the fifth arc surface (361), the second arc surface (262) corresponds to the sixth arc surface (362), the third arc surface (263) corresponds to the seventh arc surface (363), and the fourth arc surface (264) corresponds to the eighth arc surface (364).

7. The smooth running linear guide rail according to claim 6, characterized in that The third arc surface (263) and the seventh arc surface (363) form a non-load path channel, and the second arc surface (262) and the sixth arc surface (362), the fourth arc surface (264) and the eighth arc surface (364) form a reflux circulating path channel. The non-load path channel and the reflux circulating path channel are both circular arc channels.

8. The smooth running linear guide rail according to claim 6, wherein The track (3) is provided with a track groove arranged along the length direction of the track (3) on both sides, and two arc surfaces are integrally processed on the upper and lower sides of the track groove, and the two arc surfaces are a first track arc surface (11) and a second track arc surface (12). The first cambered surface (261), the fifth cambered surface (361), the first track cambered surface (11) and the second track cambered surface (12) constitute a Gothic load path channel.

9. The smooth running linear guide rail according to claim 8, characterized in that The first track cambered surface (11) and the second track cambered surface (12) on both sides are provided with grooves accommodating the baffle (24).

10. The smooth running linear guide rail according to claim 2, wherein The lower sliding block (2) is provided with a first through hole (21) and a second through hole (22), and the upper sliding block (1) is provided with a first threaded hole (31) and a second threaded hole (32) matched with the first through hole (21) and the second through hole (22). The second through hole (22) is arranged on the positioning plate (25), and the second threaded hole (32) is arranged on the positioning groove (35).

11. The smooth running linear guide rail according to claim 8, wherein The radius of the Gothic load path channel is r, and the diameter of the ball (5) is d, so the relationship between r and d is: r = 0.55-0.6d.

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