Returning device structure and rolling linear guide rail pair
By adopting a cross-shaped returner assembly and integrated baffle design in the returner structure, the problem of assembly instability caused by manufacturing errors in traditional returners is solved, achieving smooth operation and long service life of the rolling linear guide pair, and reducing noise and production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-22
- Publication Date
- 2026-03-27
AI Technical Summary
The reversing mechanism structure of traditional rolling linear guide pairs suffers from poor assembly quality stability due to manufacturing errors, resulting in problems such as jamming, obstruction, noise, and short service life. Furthermore, manual adjustment of interface errors is required, increasing production and after-sales costs.
Two sets of return assemblies are adopted, each set including two return assemblies. Return part one and return part two are directly machined on the return assemblies to form cross-shaped internal and external raceways, which simplifies the assembly process and avoids interface errors. Baffle one and baffle two are integrated with the return assemblies, eliminating the need for a clamping strip structure.
It achieves unobstructed reversal and smooth transmission, reduces noise and heat generation, extends service life, simplifies operation procedures, reduces production costs, and improves product consistency and work efficiency.
Smart Images
Figure CN121739010A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of linear motion systems, in particular to a return device structure and a rolling linear guide rail pair. BACKGROUND
[0002] With the rapid development of the mechanical industry, as the core functional component to realize high-precision linear transmission, the linear motion guide rail pair has gone through three key development stages: First stage: sliding guide rail pair It is mainly used in the linear motion of the early machine tool workbench, without a return device, and has defects such as large friction coefficient, high driving power, slow response speed, limited positioning accuracy, etc., and cannot meet the needs of precision manufacturing, so it is gradually replaced in subsequent development.
[0003] Second stage: linear steel ball rolling guide rail pair To overcome the inherent defects of sliding guide rail, linear steel ball rolling guide rail pair emerged as the times require. It uses steel balls as rolling bodies, and the friction coefficient is significantly reduced, and the overall performance is greatly improved, and it has been widely used in mechanical equipment. However, the steel ball and the guide rail and the slider are in point contact, with large unit pressure, high contact stress, limited carrying capacity, and easy vibration during work, which is difficult to meet the increasingly improved mechanical motion requirements.
[0004] Third stage: rolling linear guide rail pair To overcome the limitations of steel ball guide rail, mechanical engineering and technical personnel have developed rolling linear guide rail pair. The rolling cylinder and the guide rail and the slider are in line contact, which has the advantages of small unit pressure, low contact stress, strong extreme pressure resistance, and high carrying capacity under the same load compared with point contact, and has been widely used in heavy equipment and high-load working conditions. The products of the second and third stages are collectively referred to as "rolling linear guide rail pair".
[0005] In the rolling linear guide rail pair, the rolling body (steel ball or rolling cylinder) needs to realize infinite circulation in the slider, so as to form the linear motion of the guide rail pair. The circulation of the rolling body in the slider is realized by the return device inside the slider. The slider assembly, as the most complex and most difficult to manufacture component in the guide rail pair, is usually composed of a slider body, a rolling body, a sealing element, and a return device. Among them, the return device is a key component that determines the motion performance of the guide rail pair, and its design directly affects the smoothness, accuracy, noise, and life of the guide rail, thereby restricting the further application and development of the rolling guide rail pair.
[0006] For example, Figures 9~12As shown, the conventional roller linear guide vice is generally composed of a guide rail 9 and a slider assembly, wherein the slider assembly includes a slider 2, an end cover 5, a roller 11, a returner 6, a return roller channel through hole 10 penetrating through the slider 2 along the extension direction of the guide rail 9, a baffle 7 and a clamping strip 8, the slider 2 is provided with a slider roller channel on the inner side wall close to the guide rail 9, the returner 6 is placed in the arc roller channel return groove of the end cover 5 to be connected with the return roller channel and the slider roller channel, so that the roller 11 can freely roll in the closed circulation path formed by the slider roller channel, the return roller channel and the returner 6. The baffle 7 is arranged between the two slider roller channels on the same side of the slider 2, and the baffle 7 is fixed on the slider 2 through the clamping strip 8, and the baffle 7 is used for preventing the roller 11 from falling off in the slider roller channel. In the structure, the returner 6 structure is composed of the returner 6, the return roller channel, the baffle 7 and the clamping strip 8, and the characteristics of the multi-part cooperative assembly of the returner 6 structure makes it inevitably face the problem of cumulative error of part interface. Such errors present bidirectional uncertainty in the assembly process: on the one hand, the size tolerance and shape tolerance of part may be superimposed and enlarged, resulting in that the total assembly error exceeds the design threshold; on the other hand, in a few cases, the error directions of parts are opposite, which may form temporary error coverage and offset, causing the illusion of “assembly qualification”. Such uncertainty directly leads to poor stability of the assembly quality of the slider assembly, and becomes the core hidden danger affecting the consistency of the product. For the slider with error accumulation exceeding the standard, a series of defects such as jamming, blocking, temperature rise and noise may occur in the running process. In view of the above assembly defects, the assembly workers usually use the method of knocking the end cover 5 with a hammer according to experience to adjust the error, but the slider with adjusted error by knocking often has error rebound phenomenon, resulting in that the slider meets the basic performance requirements in the factory detection, but the error problem appears again in the process of transportation bumping, installation and debugging or actual running, which greatly increases the production and after-sales cost of the enterprise, damages the product reputation, and becomes an important obstacle to the high-quality development of the roller linear guide vice. SUMMARY
[0007] The purpose of the present application is to provide a returner structure and a roller linear guide vice to solve the problems existing in the prior art, run smoothly, return without blocking, transmission smoothly, greatly reduce the noise in the whole component work, greatly improve the heating condition, greatly improve the service life, improve the overall performance of the product; simplify the operation process, no need for human adjustment of interface error, improve the work efficiency, and reduce the production cost.
[0008] To achieve the above purpose, the present application provides the following scheme: This invention provides a reversing device structure, comprising two sets of reversing device assemblies. Each set of reversing device assemblies includes two reversing device bodies. Each reversing device body includes a first reversing part and a tubular second reversing part. Each first reversing part is fixedly connected to one end of a corresponding second reversing part. Each second reversing part is fitted into a mounting groove of a slider. The two first reversing parts of each reversing device assembly are disposed at both ends of the slider. The two first reversing parts of each reversing device assembly are arranged in a cross-shaped arrangement. Each first reversing part is provided with an inner raceway and an outer reversing raceway. Each second reversing part is provided with an inner raceway that communicates with the first inner raceway and forms an inner reversing raceway. The two reversing device bodies of each reversing device assembly are a first reversing device body and a second reversing device body. The inner reversing raceway of the first reversing device body, the groove of the slider, and the outer reversing raceway of the corresponding second reversing device body can be sequentially connected to form a circulating raceway for the rolling element to circulate.
[0009] Preferably, it further includes a baffle plate 1 corresponding to each of the returner bodies and a baffle plate 2 corresponding to each of the returner bodies. Each baffle plate 1 and each baffle plate 2 is fixedly connected to the corresponding return part 1. Each baffle plate 1 and each baffle plate 2 is used to be disposed in the slide groove. Each baffle plate 1 and each baffle plate 2 extends along the length direction of the slide groove. Each baffle plate 1 and baffle plate 2 of each returner body is used to contact the two ends of the rolling element that moves into the slide groove.
[0010] Preferably, the free ends of the first baffle and the second baffle of each of the reversing bodies are engaged with the reversing part of the other reversing body of the corresponding reversing assembly.
[0011] Preferably, one end of each of the first baffles is fixedly connected to the end of the corresponding return part one that is away from the return part two, and one end of each of the second baffles is fixedly connected to the end of the corresponding return part one that is away from the return part two.
[0012] Preferably, the two reversing portions of each of the reversing bodies, one side of each portion close to the other, are respectively used to contact the two ends of the slider.
[0013] Preferably, the internal return raceway is L-shaped.
[0014] Preferably, each of the external return raceways is an arc-shaped groove disposed on an outer wall of the corresponding return section.
[0015] Preferably, each of the reversing heads includes two detachably fixedly connected semi-reversing heads, each of the semi-reversing heads is provided with a raceway groove, and when the two semi-reversing heads are fixedly connected, the two raceway grooves form the internal reversing raceway.
[0016] Preferably, the projection of the external return raceway on the first projection plane and the projection of the internal raceway on the first projection plane are arranged in a cross shape, and the first projection plane is perpendicular to the movement direction of the slider.
[0017] The present invention also provides a rolling linear guide pair, including a slider, a guide rail and the aforementioned return mechanism structure. One side of the guide rail is disposed in the slide groove of the slider. Two mounting grooves are provided on each side of the slide groove of the slider. Two return parts of each return mechanism assembly are disposed at both ends of the slider, and each return part is sleeved in one mounting groove of the slider.
[0018] The present invention achieves the following technical effects compared to the prior art: This invention provides a return mechanism structure and a rolling linear guide pair, comprising two sets of return mechanism assemblies. Each set of return mechanism assemblies includes two return mechanism bodies. Each return mechanism body includes a first return mechanism and a tubular second return mechanism. Each first return mechanism is fixedly connected to one end of a corresponding second return mechanism. Each second return mechanism is fitted into a mounting groove of a slider. The two first return mechanisms of each return mechanism assembly are disposed at both ends of the slider. The two first return mechanisms of each return mechanism assembly are arranged in a cross-shaped manner. Each first return mechanism is provided with an inner raceway and an outer return raceway. Each second return mechanism is provided with an inner raceway that communicates with the first inner raceway and forms an inner return raceway. The two return mechanism bodies of each return mechanism assembly are a first return mechanism body and a second return mechanism body. The inner return raceway of the first return mechanism body, the slide groove of the slider, and the outer return raceway of the corresponding second return mechanism body can be sequentially connected to form a circulating raceway for the rolling element to circulate.
[0019] In traditional return mechanisms, the return raceway is partially located on the slider and partially on the return mechanism itself. When these two parts of the return raceway are joined, manufacturing errors can easily lead to assembly defects. This invention directly machines both internal raceway one and internal raceway two onto the return mechanism body. This simplifies assembly, eliminates the aforementioned interface error problems, and prevents jamming and obstruction during application. The rolling elements move more smoothly between the slider and guide rail, resulting in unobstructed return and more stable transmission. Consequently, the overall component operates with significantly reduced noise, improved heat generation, and extended service life, enhancing overall product performance. Furthermore, it simplifies the operation process, eliminating the need for manual adjustment of interface errors, improving work efficiency, and reducing production costs. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of the return device body provided in Embodiment 1; Figure 2 This is a schematic diagram of the semi-returner provided in Example 1; Figure 3 Schematic diagram of the reversing device assembly provided in Embodiment 1 Figure 1 ; Figure 4 Schematic diagram of the reversing device assembly provided in Embodiment 1 Figure 2 ; Figure 5 Schematic diagram of the rolling linear guide pair (excluding the guide rail) provided in Example 2 Figure 1 ; Figure 6 Schematic diagram of the rolling linear guide pair (excluding the guide rail) provided in Example 2 Figure 2 ; Figure 7 A side view of the rolling linear guide pair (excluding the guide rail) provided in Embodiment 2; Figure 8 for Figure 7 Sectional view of AA; Figure 9 This is a schematic diagram of the structure of a traditional roller linear guide pair in the background art; Figure 10 This is a cross-sectional schematic diagram of a return device in the background art; Figure 11 This is a schematic diagram of the baffle structure in the background art; Figure 12 This is a schematic diagram of the card strip structure in the background art; In the diagram: 100, Reversing device structure; 200, Rolling linear guide pair; 1, Reversing device assembly; 101, Reversing device body; 102, Reversing part one; 103, Reversing part two; 104, Internal raceway one; 105, External reversing raceway; 106, Internal raceway two; 107, Semi-reversing device; 2, Slider; 201, Mounting groove; 3, Baffle one; 4, Baffle two; 5, End cap; 6, Reversing device; 7, Baffle; 8, Clip; 9, Guide rail; 10, Reversing raceway through hole; 11, Roller. Detailed Implementation
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "center," "longitudinal," "transverse," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "clockwise," and "counterclockwise," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Additionally, it should be noted that in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0024] The purpose of this invention is to provide a reversing device structure and a rolling linear guide pair to solve the problems existing in the prior art. It ensures smooth operation, unobstructed reversal, stable transmission, significantly reduced noise during operation, greatly improved heat generation, and significantly extended service life, thereby improving the overall performance of the product. It also simplifies the operation process, eliminates the need for manual adjustment of interface errors, improves work efficiency, and reduces production costs.
[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] Example 1 like Figures 1~8As shown, this embodiment provides a reversing device structure 100, including two sets of reversing device assemblies 1. Each set of reversing device assemblies 1 includes two reversing device bodies 101. Each reversing device body 101 includes a first reversing part 102 and a tubular second reversing part 103. Each first reversing part 102 is fixedly connected to one end of a corresponding second reversing part 103. Each second reversing part 103 is used to be sleeved in a mounting groove 201 of a slider 2. The two first reversing parts 102 of each reversing device assembly 1 are used to be disposed at both ends of the slider 2. The two return parts are arranged in a cross pattern. Each return part 102 is provided with an internal raceway 104 and an external return raceway 105. Each return part 2 103 is provided with an internal raceway 2 106 that communicates with the internal raceway 104 and forms an internal return raceway. The two return bodies 101 of each returner assembly 1 are returner body 1 and returner body 2, respectively. The internal return raceway of each returner body 1, the slide groove of the slider 2, and the corresponding external return raceway 105 of the returner body 2 can be connected in sequence to form a circulating raceway for the rolling element to circulate. In traditional returners, part of the return raceway is located on the slider 2 and part is located on the returner. When the two parts of the return raceway are connected, assembly defects are easily caused by manufacturing errors. In this embodiment, both internal raceways 104 and 106 are directly machined onto the returner body 101, resulting in a simple assembly. During assembly, the returner structure 100 does not have the aforementioned interface error problem. In application, there are no adverse phenomena such as jamming or obstruction. The rolling elements run more smoothly between the slider 2 and the guide rail, with no obstruction during return and more stable transmission. Therefore, the noise of the entire component is greatly reduced during operation, the heat generation is greatly improved, and the service life is greatly extended, thus improving the overall performance of the product. The operation process is simplified, eliminating the need for manual adjustment of interface errors, improving work efficiency, and reducing production costs.
[0027] In some embodiments, the second return part 103 slides into the corresponding mounting groove 201, so that the second return part 103 can be easily placed into the mounting groove 201.
[0028] In some embodiments, a first baffle 3 and a second baffle 4 corresponding to each of the returner bodies are also included. Each first baffle 3 and each second baffle 4 are fixedly connected to the corresponding return part 102. Each first baffle 3 and each second baffle 4 are used to be disposed in the slide groove. Each first baffle 3 and each second baffle 4 extend along the length direction of the slide groove. The first baffle 3 and the second baffle 4 of each returner body are respectively used to contact the two ends of the rolling element that moves into the slide groove. By limiting the two sides of the slider 2 with the first baffle 3 and the second baffle 4, the rolling element can be better prevented from falling off during movement. In this embodiment, the first baffle 3 and the second baffle 4 are integrated with the returner, which further improves the integration level and eliminates the structure of the retaining strip 8, simplifying the structure, reducing parts and management costs, and simplifying the operation process.
[0029] In some embodiments, the free ends of the first baffle 3 and the second baffle 4 of each reversing body 101 are engaged with the reversing portion 102 of another reversing body 101 in the same reversing assembly 1. After the two reversing bodies 101 are assembled on the slider, the free ends of the first baffle 3 and the second baffle 4 of one reversing body 101 are engaged with the reversing portion 102 of the other reversing body 101, ensuring the stability of the connection and facilitating assembly.
[0030] In some embodiments, one end of each baffle 3 is fixedly connected to the end of the corresponding return section 102 away from the return section 2 103, and one end of each baffle 2 4 is fixedly connected to the end of the corresponding return section 102 away from the return section 2 103.
[0031] In some embodiments, the two reversing portions 102 of each reversing body 101 are positioned close to each other on one side to contact both ends of the slider 2, ensuring that the reversing assembly 1 does not wobble along the length of the slide groove after being installed on the slider 2. The free ends of the baffle 3 and the baffle 4 extend out of the slide groove and engage with the corresponding reversing portion 102.
[0032] In some embodiments, the free end of the second return portion 103 of one return body 101 of each return assembly 1 contacts the limiting groove of the first return portion 102 of the other return body 101. Each limiting groove can restrict the movement of the free end of the corresponding second return portion 103 toward the corresponding first return portion 102 (the first return portion 102 integrally formed with the second return portion 103). Each limiting groove can restrict the movement of the corresponding second return portion 103 along its own length direction.
[0033] In some implementations, the internal return raceway is L-shaped.
[0034] In some embodiments, each external return raceway 105 is an arc-shaped groove provided on the outer wall of the corresponding return section 102.
[0035] In some embodiments, each reversing unit body 101 includes two detachably fixedly connected semi-reversing units 107. Each semi-reversing unit 107 is provided with a raceway groove, and when the two semi-reversing units 107 are fixedly connected, the two raceway grooves form an internal reversing raceway. The various parts of the semi-reversing unit 107 (reversing part one 102, reversing part two 103, baffle one 3, and baffle two 4) are integrally formed. After the semi-reversing units 107 are processed, they are assembled to form the reversing unit body 101, which facilitates manufacturing.
[0036] In some implementations, the two semi-reverse units 107 are connected by a snap-fit mechanism for easy assembly.
[0037] In some embodiments, the projection of the outer return raceway 105 on the first projection plane and the projection of the inner raceway 104 on the first projection plane are arranged in a cross shape, and the first projection plane is perpendicular to the movement direction of the slider 2.
[0038] In some implementations, the retroreflector structure 100 is manufactured using an injection molding process.
[0039] In some embodiments, the rolling element is a roller. The return section 2 103 is a circular tube.
[0040] Example 2 This embodiment provides a rolling linear guide pair 200, including a slider 2, a guide rail, and a return mechanism structure 100 as described in Embodiment 1. One side of the guide rail is disposed within a groove of the slider 2. Two mounting slots 201 are provided on each side of the groove of the slider 2. Two return parts 102 of each return mechanism assembly 1 are disposed at both ends of the slider 2, and each return part 103 is fitted into one mounting slot 201 of the slider 2. In this embodiment, the internal raceway 104 and the internal raceway 106 are directly machined onto the return mechanism body 101, resulting in a simple assembly. During assembly, the return mechanism structure 100 does not have the aforementioned interface error problem. In application, there are no adverse phenomena such as jamming or obstruction. The rolling elements run more smoothly between the slider 2 and the guide rail, with no obstruction in return and more stable transmission. Therefore, the noise of the entire component during operation is greatly reduced, the heat generation is greatly improved, and the service life is greatly extended, thus improving the overall performance of the product. The operation process is simplified, eliminating the need for manual adjustment of interface errors, improving work efficiency, and reducing production costs.
[0041] In some implementations, the rolling linear guide pair 200 is a roller linear guide pair.
[0042] In some embodiments, end caps 5 are fixedly connected to both ends of the slider 2, preferably by screws. An arc-shaped end cap groove is provided on the inner side wall of the end cap 5. The end cap groove is opposite to the outer return raceway 105. When the rolling body rolls onto the outer return raceway 105, the rolling body can pass through the end cap groove. The end cap groove can limit the two ends and the outer side wall of the rolling body.
[0043] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A reversing device structure, characterized in that: The device includes two sets of return assemblies. Each set of return assemblies includes two return bodies. Each return body includes a first return section and a tubular second return section. Each first return section is fixedly connected to one end of the corresponding second return section. Each second return section is fitted into a mounting groove of a slider. The two first return sections of each return assembly are located at both ends of the slider. The two first return sections of each return assembly are arranged in a cross pattern. Each first return section has an inner raceway and an outer return raceway. Each second return section has an inner raceway that communicates with the first inner raceway and forms an inner return raceway. The two return bodies of each return assembly are a first return body and a second return body. The inner return raceway of the first return body, the groove of the slider, and the outer return raceway of the corresponding second return body can be sequentially connected to form a circulating raceway for the rolling element to circulate.
2. The reversing device structure according to claim 1, characterized in that: It also includes a baffle plate 1 corresponding to each of the returner bodies and a baffle plate 2 corresponding to each of the returner bodies. Each baffle plate 1 and each baffle plate 2 is fixedly connected to the corresponding return part 1. Each baffle plate 1 and each baffle plate 2 is used to be disposed in the slide groove. Each baffle plate 1 and each baffle plate 2 extends along the length direction of the slide groove. Each baffle plate 1 and baffle plate 2 of each returner body is used to contact the two ends of the rolling element that moves into the slide groove.
3. The reversing device structure according to claim 2, characterized in that: The free ends of the first baffle and the second baffle of each of the reversing bodies are engaged with the reversing part of the other reversing body of the corresponding reversing assembly.
4. The reversing device structure according to claim 2, characterized in that: One end of each of the baffles is fixedly connected to the end of the corresponding return part one that is away from the return part two, and one end of each of the baffles is fixedly connected to the end of the corresponding return part one that is away from the return part two.
5. The reversing device structure according to claim 1, characterized in that: The two reversing portions of each of the reversing bodies, one side of each portion close to the other, are respectively used to contact the two ends of the slider.
6. The reversing device structure according to claim 1, characterized in that: The internal return raceway is L-shaped.
7. The reversing device structure according to claim 1, characterized in that: Each of the external return raceways is an arc-shaped groove provided on the outer wall of the corresponding return section.
8. The reversing device structure according to claim 1, characterized in that: Each of the reversing heads includes two detachably fixedly connected semi-reversing heads. Each semi-reversing head is provided with a raceway groove. When the two semi-reversing heads are fixedly connected, the two raceway grooves form the internal reversing raceway.
9. The reversing device structure according to claim 8, characterized in that: The projection of the external return raceway on the first projection plane and the projection of the internal raceway on the first projection plane are arranged in a cross shape, and the first projection plane is perpendicular to the movement direction of the slider.
10. A rolling linear guide pair, characterized in that: The device includes a slider, a guide rail, and a return mechanism structure as described in any one of claims 1 to 9. One side of the guide rail is disposed in the slide groove of the slider. Two mounting slots are provided on each side of the slide groove of the slider. Two return parts of each return mechanism assembly are disposed at both ends of the slider, and each return part is sleeved in one of the mounting slots of the slider.