Roller guide rail with high retention

Abstract

The application relates to the technical field of linear motion devices, in particular to a roller guide rail with high retention, which comprises a guide rail, a sliding block in sliding cooperation with the guide rail, two return covers, two retaining frame assemblies, a retaining strip and a supporting component. The two return covers are respectively arranged at the two ends of the sliding block. The two retaining frame assemblies are respectively arranged at the two sides of the guide rail. Each retaining frame assembly comprises the retaining strip, the retaining strip is inserted on the inner side wall of the sliding block, the roller groove is formed between the retaining strip and the sliding block, the roller groove is located at the upper and lower sides of each retaining strip, four through holes are arranged on the sliding block, the through holes are located at the two sides of the guide rail and at the upper and lower sides of the retaining strip, and the supporting component is arranged on the retaining strip and located between the retaining strip and the guide rail and abuts against the guide rail. The application arranges the supporting component between the retaining strip and the guide rail, avoids the bending of the retaining strip, limits the rolling path of the roller when the roller rolls between the retaining strip and the sliding block, and improves the stability of the sliding block moving along the guide rail.

Description

Technical Field

[0001] This application relates to the field of linear motion device technology, and in particular to a roller guide with high retention performance. Background Technology

[0002] With the rapid development of automation, more and more manufacturers are using linear guide slides as a support for the movement of machine tool work platforms. The working principle of a linear guide slide is that steel balls or rollers roll between a precision-ground track and a slide, and the slide can reciprocate with high precision through circulators at both ends of the slide.

[0003] Currently, in existing technologies, when rollers roll between the slider and the guide rail, a retainer maintains the assembly relationship between the roller and the slider. The retaining mechanism typically involves holding the roller at one end via the slider groove surface and at the other end via a plastic retainer. Figure 1 As shown in small figure a, most existing retainers are locked to the slider by screws on the side of the slider, or by snap-fitting the retainers with two end caps.

[0004] However, drilling holes for screw installation is difficult, the tools wear out quickly, and the cost is high. Furthermore, the slider assembly process is cumbersome and time-consuming, making automated production difficult. When the cage is fixed using a double-end return cap snap-fit ​​method, the cage's connection points are only at both ends, resulting in insufficient rigidity. As the rollers roll, they tilt and change position, exerting force on the cage and causing bending in the middle section. Figure 1 As shown in small figure b, this prevents the rollers from rolling smoothly, further affecting the smooth operation of the slider. It also causes the cage to rub against the track, resulting in fluctuating rolling resistance. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing slider retainer is difficult to maintain the smooth operation of the roller between the slider and the guide rail.

[0006] Therefore, this utility model provides a roller guide with high retention performance.

[0007] The technical solution adopted by this utility model to solve its technical problem is: A roller guide with high retention, including A guide rail, and a slider that slides with the guide rail; Two return covers are respectively installed on both ends of the slider; Two cage assemblies are respectively disposed on both sides of the guide rail, and each cage assembly includes: A retaining bar is inserted into the inner wall of the slider. A roller groove is formed between the retaining bar and the slider. The roller groove is located on the upper and lower sides of each retaining bar. The slider is provided with four through holes, which are located on both sides of the guide rail and on the upper and lower sides of the retaining bar. A support component is disposed on the retaining bar and located between the retaining bar and the guide rail, abutting against the guide rail.

[0008] Furthermore, the support component includes: A pin, which is inserted into the side wall of the retaining strip facing the guide rail; A top block is disposed at the end of the pin facing the guide rail, and the top block is in rolling engagement with the guide rail.

[0009] Furthermore, the top block is spherically embedded in the end of the pin.

[0010] Furthermore, the top block is rolled and embedded at the end of the pin body. The top block is cylindrical, and its axial direction is perpendicular to the length direction of the guide rail. The arc-shaped sidewall of the top block abuts against the sidewall of the guide rail.

[0011] Furthermore, the support component is positioned in the middle of the retaining strip.

[0012] Furthermore, the surface on the retaining strip opposite to the roller groove is defined as the rolling surface, and the rolling surface is provided with a clearance groove.

[0013] Furthermore, the clearance grooves are provided at equal intervals along the length direction of the retaining strip.

[0014] Furthermore, the retaining strip is provided with a stop bar, which is located on the side of the roller groove near the guide rail, and the stop bar is used to prevent the roller from falling out of the roller groove.

[0015] Furthermore, the cage assembly also includes, The first insertion tube is inserted into a through hole on one side of the guide rail and is connected to one end of the retaining strip. The second insertion tube is inserted into another through hole on one side of the guide rail and connected to the other end of the retaining strip.

[0016] Furthermore, the insertion tube or retaining strip is provided with a positioning block, and the retaining strip or insertion tube is provided with a positioning groove for the positioning block to be inserted. The first insertion tube and the second insertion tube are respectively inserted and engaged with both ends of the retaining strip.

[0017] The beneficial effects of this utility model are that a support component is provided between the retaining bar and the guide rail. The support component supports the distance between the guide rail and the retaining bar, thereby maintaining the straightness of the retaining bar and preventing the retaining bar from bending. This restricts the rolling path of the roller when it rolls between the retaining bar and the slider, prevents the roller from deflecting and squeezing the retaining bar, and ensures that the rolling resistance fluctuation of the slider is very stable, thereby improving the stability of the slider moving along the guide rail. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the rolling state of a roller between a slider and a retaining bar in the background art.

[0020] Figure 2 This is a structural schematic diagram of the assembly relationship between the slider and the guide rail in this utility model.

[0021] Figure 3 This is a structural diagram illustrating the assembly relationship between the slider and the retaining bar in this utility model.

[0022] Figure 4 This is a structural schematic diagram of the assembly relationship between the cage assembly and the slider in this utility model.

[0023] Figure 5 This is a structural schematic diagram of the installation position of the support component in this utility model.

[0024] Figure 6 This is a schematic diagram of the clearance groove in this utility model.

[0025] Figure 7 This is a schematic diagram of the top block in Embodiment 1 of this utility model.

[0026] Figure 8 This is a schematic diagram of the top block in Embodiment 2 of this utility model.

[0027] Figure 9 This is a structural schematic diagram of the cage assembly in this utility model.

[0028] In the figure: 1. Guide rail; 2. Slider; 21. First through hole; 22. Second through hole; 3. Return cover; 4. Cage assembly; 41. Holding bar; 410. Rolling surface; 411. First groove; 412. Second groove; 413. Insert bar; 414. Support component; 415. Pin; 416. Top block; 417. Stop bar; 418. Positioning groove; 419. Clearance groove; 42. First insertion tube; 421. First return part; 422. First extension part ; 423, First channel; 424, First straight hole; 425, First return hole; 426, First branch pipe; 427, First and second branch pipes; 43, Second insertion tube; 431, Second return section; 432, Second extension section; 433, Second channel; 434, Second straight hole; 435, Second return hole; 436, Second branch pipe; 437, Second branch pipe; 44, Positioning block; 45, Mounting pin; 46, Insertion block; 47, Connecting block. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Reference Figure 2A roller guide 1 with high retention includes a slider 2, a guide rail 1, a return cover 3 and a cage assembly 4. The slider 2 slides along the length of the guide rail 1 and is slidably engaged with the guide rail 1. The cage assembly 4 is disposed on the slider 2, and the return cover 3 is disposed on both ends of the slider 2. The cage assembly 4 and the return cover 3 together form a circulating channel for the roller to roll.

[0033] The retaining bar 41 is inserted on the two opposite inner sidewalls of the slider 2. Two roller grooves are formed between the two inner sidewalls of the slider 2 and the retaining bar 41. The two roller grooves are arranged along the Z-axis and are located on the upper and lower sides of the retaining bar 41 respectively. The roller grooves on the slider 2 and the rolling grooves on the guide rail 1 together form a roller channel. Each side of the guide rail 1 has a through hole on the slider 2. There are two through holes on each side of the guide rail 1 along the Z-axis and located on the upper and lower sides of the retaining bar 41 respectively.

[0034] like Figure 3 , 4 As shown, there are two retainer assemblies 4, one on each side of the guide rail 1. Taking the retainer assembly 4 on the left side of the guide rail 1 as an example: the retainer assembly 4 includes a retaining strip 41, a first insert 42, and a second insert 43. A slot is provided in the middle of the two roller grooves on the slider 2. The retaining strip 41 is provided with an insert 413 that is inserted into the slot and has an interference fit. For ease of explanation, the upper through hole on each side of the guide rail 1 is called the first through hole 21, the lower through hole is called the second through hole 22, the upper roller groove is called the first groove 411, and the lower roller groove is called the second groove 412. The first groove 411 and the second groove 412 are located on the upper and lower sides of the retaining strip 41, respectively. The retaining bar 41 is provided with two baffles 417. The two baffles 417 are respectively located on the side of the first groove 411 and the second groove 412 near the guide rail 1. The baffles 417 are used to prevent the rollers from falling out of the first groove 411 and the second groove 412.

[0035] The ratio of the width L of the first groove 411 and the length L1 of the roller is greater than 1 and less than 1.05. If the ratio is too large, the roller will tilt severely when sliding, and if it is too small, the roller will be stuck and unable to slide. Therefore, it is very important to completely fix the upper and lower retaining strips 41.

[0036] Therefore, a support member 414 is provided on the side wall of the retaining strip 41 facing the guide rail 1, such as Figure 5 As shown, the support member 414 is disposed in the middle part of the retaining strip 41. The support member 414 is supported between the guide rail 1 and the retaining strip 41, supports the retaining strip 41, prevents the retaining strip 41 from deforming, constrains the rolling path in the first groove and the second groove, avoids the roller from deflecting when rolling, and can also further prevent the roller from deflecting and squeezing the retaining strip 41, causing the retaining strip 41 to deform.

[0037] The support component 414 includes a pin 415 and a top block 416. The pin 415 is inserted into the side wall of the retaining strip 41 facing the guide rail 1. The retaining strip 41 is provided with a receiving hole for the pin 415 to be installed. In this embodiment, the receiving hole is located in the middle position of the retaining strip 41. The axial direction of the pin 415 is perpendicular to the length direction of the guide rail 1. The top block 416 is rolled and embedded in the end of the pin 415 away from the retaining strip 41. The top block 416 abuts against the guide rail 1. Preferably, there is a certain gap between the top block 416 and the guide rail 1.

[0038] like Figure 6 As shown, in this embodiment, the top block 416 is spherical. When the slider 2 moves along the guide rail 1, the top block 416 rolls with the guide rail 1. The spherical top block 416 holds the guide rail 1, and the pin 415 holds the retaining strip 41 in the opposite direction, preventing the retaining strip 41 from bending or deforming. The rolling engagement of the top block 416 and the guide rail 1 does not affect the normal sliding of the slider 2 and does not make the rolling resistance too large. In other embodiments, multiple support members 414 may also be provided along the length of the retaining strip 41.

[0039] Furthermore, the surface on the retaining strip 41 opposite to the first groove 411 and the second groove 412 is defined as the rolling surface 410, and the rolling surface 410 is provided with a clearance groove 419, such as... Figure 8 As shown, the clearance groove 419 reduces the contact area between the rollers and the rolling surface 410 in the first groove 411 and the second groove 412, thereby reducing the pressure of the rollers on the retaining strip 41. Furthermore, the clearance groove 419 provides deformation space for the retaining strip 41, preventing the overall shape of the retaining strip 41 from bending. In this embodiment, multiple clearance grooves 419 are equidistantly spaced along the length of the retaining strip 41.

[0040] like Figure 4 , 8As shown, the straight portion of the first insertion tube 42 is inserted into the first through hole 21. The first insertion tube 42 includes a first reversing portion 421 disposed at its end. The second insertion tube 43 is inserted into the second through hole 22. The second insertion tube 43 includes a second reversing portion 431 disposed at its end. The second reversing portion 431 is disposed at the end away from the first reversing portion 421. The first return section 421 is provided with a first return groove, one end of which is connected to the first groove 411 and the other end extends toward the second through hole 22. The second return section 431 is provided with a second return groove, one end of which is connected to the second groove 412 and the other end extends toward the first through hole 21. Both the first return section 421 and the second return section 431 are provided with positioning blocks 44. The positioning blocks 44 are wider on the side facing the guide rail 1. The two positioning blocks 44 are respectively inserted into the positioning grooves 418 provided at both ends of the retaining strip 41. When the two insert tubes are installed facing each other, they are respectively inserted into the two ends of the upper and lower retaining strips 41. This can ensure the axial movement of the insert tubes and also press the two ends of the upper and lower retaining strips 41 by the insert tubes to prevent the upper and lower retaining strips 41 from moving outward, thereby ensuring the stability of the installation of the first insert tube 42, the second insert tube 43, and the retaining strip 41.

[0041] The straight portion of the first insertion tube 42 has a first extension 422 at the end away from the first return portion 421. The first extension 422 has a plurality of mounting pins 45. The mounting pins 45 can be located at the end of the first insertion tube 42 or at the end of the first extension 422. The mounting pins 45 are inserted into the mounting holes on the second return portion 431. Similarly, the second insertion tube 43 also has a second extension 432 and mounting pins 45. The first return portion 421 also has mounting holes. The first insertion tube 42 and the second insertion tube 43 are inserted and fixed to each other by the cooperation of the mounting pins 45 and the mounting holes.

[0042] Both the first elongated portion 422 and the second elongated portion 432 are semi-enclosed. The end faces of the first elongated portion 422 and the second elongated portion 432 extend to the side of the second return groove away from the second groove 412 and the side of the first return groove away from the first groove 411, respectively. This prevents the elongated portion from coming off and falling off during the process of the roller entering the return groove.

[0043] The first insertion tube 42 has a first channel 423, which includes a first straight hole 424 and a first return hole 425 that are interconnected. The first straight hole 424 is located within the first through hole 21. The first return hole 425 and the first return portion 421 are located on the same side of the slider 2, and the first return hole 425 extends toward the second groove 412. The second insertion tube 43 has a second channel 433, which includes a second straight hole 434 and a second return hole 435 that are interconnected. The second straight hole 434 is located within the second through hole 22. The second return hole 435 and the second return portion 431 are located on the same side of the slider 2, and the second return hole 435 extends toward the first groove 411.

[0044] The return cover 3 is installed on both ends of the slider 2. The return cover 3 is provided with grooves that are adapted to the first return groove and the second return groove, and forms a groove between the first return groove and the second return groove for the roller to pass through. The first extension 422 and the second extension 432 are each provided with a plug 46 for inserting into the return cover 3. The first plug tube 42 and the second plug tube 43 are spliced ​​together with the slider 2 and the return cover 3 to form a circulating channel for the roller to roll back and forth.

[0045] It should be noted that both the first insertion tube 42 and the second insertion tube 43 are separate units. Taking the plane containing the center curve of the first channel 423 as the dividing plane, the first insertion tube 42 includes a first branch tube 426 and a first branch tube 427, which are connected together by a connector block 47 and a connector slot. Taking the plane containing the center curve of the second channel 433 as the dividing plane, the second insertion tube 43 includes a second branch tube 436 and a second branch tube 437, which are connected together by a connector block 47 and a connector slot.

[0046] Example 2 The difference from Example 1 is that, as Figure 7 As shown, the top block 416 is cylindrical, the axial direction of the top block 416 is perpendicular to the length direction of the guide rail 1, and the arc-shaped sidewall of the top block 416 abuts against the sidewall of the guide rail 1.

[0047] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A roller guide with high retention performance, characterized in that, include A guide rail (1), and a slider (2) that slides with the guide rail (1); Two return covers (3) are respectively placed on both ends of the slider (2); Two cage assemblies (4) are respectively disposed on both sides of the guide rail (1), and each cage assembly (4) includes: A retaining strip (41) is inserted into the inner wall of the slider (2). A roller groove is formed between the retaining strip (41) and the slider (2). The roller groove is located on the upper and lower sides of each retaining strip (41). The slider (2) is provided with four through holes, which are located on both sides of the guide rail (1) and on the upper and lower sides of the retaining strip (41). A support member (414) is disposed on a retaining strip (41) and located between the retaining strip (41) and the guide rail (1), and abuts against the guide rail (1).

2. The high-retention roller guide according to claim 1, characterized in that, The support component (414) includes: Pin (415), said pin (415) is inserted into the side wall of the retaining strip (41) facing the guide rail (1); A top block (416) is disposed at one end of the pin (415) facing the guide rail (1), and the top block (416) is in rolling engagement with the guide rail (1).

3. The high-retention roller guide according to claim 2, characterized in that, The top block (416) is slidably embedded at the end of the pin (415), and the top block (416) is spherical.

4. The high-retention roller guide according to claim 2, characterized in that, The top block (416) is rolled and embedded at the end of the pin (415). The top block (416) is cylindrical. The axial direction of the top block (416) is perpendicular to the length direction of the guide rail (1). The arc-shaped sidewall of the top block (416) abuts against the sidewall of the guide rail (1).

5. The high-retention roller guide according to claim 1, characterized in that, The support component (414) is positioned in the middle of the retaining strip (41).

6. The high-retention roller guide according to claim 1, characterized in that, The support component (414) is provided in multiple ways along the length of the retaining strip (41).

7. The high-retention roller guide according to claim 1, characterized in that, The surface on the retaining strip (41) opposite to the roller groove is defined as the rolling surface (410), and the rolling surface (410) is provided with a clearance groove (419).

8. The high-retention roller guide according to claim 7, characterized in that, The clearance groove (419) is provided at equal intervals along the length direction of the retaining strip (41).

9. The high-retention roller guide according to claim 1, characterized in that, The retaining strip (41) is provided with a stop strip (417), which is located on the side of the roller groove near the guide rail (1). The stop strip (417) is used to prevent the roller from falling out of the roller groove.

10. The high-retention roller guide according to claim 1, characterized in that, The cage assembly (4) also includes, The first insertion tube (42) is inserted into a through hole on one side of the guide rail (1) and connected to one end of the retaining strip (41); The second insertion tube (43) is inserted into another through hole on one side of the guide rail (1) and connected to the other end of the retaining strip (41).

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