False rail

Abstract

The utility model discloses a false rail which comprises two supporting parts used for keeping the positions of rolling bodies on the two corresponding sides in a sliding block. The elastic deformation part is positioned between the two supporting parts to realize elastic connection of the two supporting parts; wherein a rolling body retaining part is arranged on the face, away from the elastic deformation part, of the supporting part, and a sliding block matching part is arranged in the middle of the rolling body retaining part, so that interference fit with a sliding block is achieved. According to the utility model, the elastic deformation part is arranged in the false rail along the axial direction, the elastic applying force towards the two transverse outer sides of the sliding block is generated by utilizing the deformation of the elastic deformation part, and the elastic deformation part is uniformly deformed in a full-length range along the length direction of the sliding block through the sliding block matching part, so that the uniform rolling body retention force is generated; and different force application requirements can be met by adjusting the number of the elastic deformation parts for the sliding blocks with different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of linear guide rails, in particular to a false rail. Background Art

[0002] The false rail is assembled on the slider. The slider structure refers to Figure 7 , used to prevent the rolling elements from falling off while the slider is not installed on the track body. However, when used as an insertion fixture to install the slider on the track body, conventional dummy rail structures may impose excessive loads or eccentric load torque on the dummy rail, causing the rolling elements to fall off. On the other hand, during the transportation of the slider, the insufficient holding force between the dummy rail and the slider may cause the rolling elements to fall off.

[0003] The existing patent CN109477516A discloses a movable body retaining part and a movable body, comprising a pair of retaining parts, which are opposite to the pair of rolling body load raceway grooves to retain the multiple rolling bodies; a force-applying connecting part, which connects the pair of retaining parts to each other and applies force to the pair of retaining parts in a direction of separation from each other; and a deformation limiting part, which limits the amount of post-assembly shrinkage that the force-applying connecting part can shrink after being assembled on the movable body to below the radius of the rolling body.

[0004] The existing force-applying connections are located only at a few points along the entire length of the dummy rail, failing to ensure uniform deformation along the entire length of the slider. Consequently, they are unable to provide uniform and stable holding force to all rolling elements along the entire length of the slider. During transportation, insufficient force can easily cause rolling elements to fall off. Furthermore, when used as an insertion fixture, uneven elastic force can hinder smooth insertion and removal. Utility Model Content

[0005] The purpose of the utility model is to provide a dummy rail which can stably hold a rolling element and prevent the rolling element from falling off when used as an insertion fixture or during transportation.

[0006] The technical solution of the utility model is as follows: a false rail, comprising:

[0007] Two supporting parts are used to maintain the positions of the rolling elements on the corresponding sides of the slider;

[0008] An elastic deformation portion, located between the two support portions to achieve elastic connection between the two;

[0009] Wherein, a rolling body retaining portion is provided on a side of the support portion away from the elastic deformation portion, and a slider fitting portion is provided in the middle of the rolling body retaining portion to achieve interference fit with the slider.

[0010] Furthermore, the upper and lower surfaces of the elastic deformation portion are respectively provided with grooves, and the two grooves are staggered.

[0011] Further, one or more of the elastic deformation parts are provided between the two support parts.

[0012] Further, the rolling element holding part is provided with a second mating surface and a first mating surface for supporting the rolling elements in the support slider, and the second mating surface is connected to the first mating surface.

[0013] Further, the first mating surface is an inclined surface or an arc surface.

[0014] Further, the slider mating part is provided on the second mating surface.

[0015] Further, the slider mating part is a middle-convex arc or a gradually changing multi-segment line structure.

[0016] Further, guide parts are respectively formed by inward extension at both ends of the rolling element holding part.

[0017] Further, the dummy rail can be assembled in the slider instead of the guide rail.

[0018] Further, the dimensions of the dummy rail and the slider satisfy the following relational expression: a < L < A, where L is the distance between the inner walls on both sides of the slider, a is the distance between the second mating surfaces at both ends of the dummy rail, and A is the maximum distance between the slider mating parts at both ends of the dummy rail.

[0019] Based on the above technical solutions, the technical effects that the present utility model can achieve are as follows:

[0020] For the dummy rail of the present utility model, by providing one or more elastic deformation parts in the dummy rail, and utilizing the deformation of the elastic deformation parts, an elastic application force towards the two outer lateral directions of the slider is generated, and through the slider mating part, the elastic deformation parts are uniformly deformed within the full length range along the axial direction of the dummy rail, thereby generating a uniform rolling element holding force; and for sliders of different sizes, different force application requirements can be achieved by adjusting the number of elastic deformation parts.

[0021] For the dummy rail of the present utility model, by setting the rolling element holding part as an arc surface or an inclined surface, various types of rolling elements such as ball bearings or roller bearings can be adapted, and the rolling element holding part applies a holding force to the rolling elements, so that the rolling elements are closely fitted with the slider raceway to prevent them from falling off.

[0022] The false rail of the present utility model has a slider fitting portion arranged along the axial direction of the false rail as a middle-convex circular arc or a gradually changing multi-segment line structure with a gradually decreasing thickness from the middle to both sides, and satisfies the relationship: a < L < A; where L is the distance between the inner walls on both sides of the slider, a is the distance between the second fitting surfaces at both ends of the false rail, and A is the maximum dimension distance between the slider fitting portions at both ends of the false rail; by using the entrance dimension a < L, the false rail is more easily inserted into the slider; by using the middle dimension L < A, the slider fitting portion of the false rail causes the elastic deformation portion to elastically deform under the extrusion of the inner wall of the slider, and the false rail is relatively firmly held inside the slider, and even under external forces and impacts, it will not slip out and fall off from the slider, further ensuring the holding force of the false rail for the rolling elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a perspective view of the first embodiment of the present utility model;

[0024] Figure 2 is a front view of the first embodiment of the present utility model;

[0025] Figure 3 is a top view of the first embodiment of the present utility model;

[0026] Figure 4 is a perspective view of the second embodiment of the present utility model;

[0027] Figure 5 is a diagram of the dimensional relationship between the present utility model and the slider; <>

[0028] Figure 6 is an assembly schematic diagram of the present utility model and the slider;

[0029] Figure 7 is a structural diagram of the slider;

[0030] In the figure: 1 - support portion; 2 - elastic deformation portion; 3 - rolling element holding portion; 31 - first fitting surface; 32 - second fitting surface; 4 - slider fitting portion; 5 - slider; 6 - rolling element. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0032] As Figure 1 As shown in the figure, this embodiment provides a false rail, which includes two support portions 1 and an elastic deformation portion 2. Among them, the support portion 1 is used to maintain the positions of the rolling elements on the corresponding two sides inside the slider, and the elastic deformation portion 2 is located between the two support portions 1 to achieve elastic connection of the two support portions 1. Grooves are respectively machined on the upper plane and the lower plane of the elastic deformation portion 2 along the axial direction, and the upper and lower plane grooves are staggeredly distributed. The shape of the groove is V-shaped, semi-circular or U-shaped. The two sides of the elastic deformation portion 2 are connected to the support portion 1. When driven by an external force, the support portion 1 can move and reset under the deformation of the elastic deformation portion 2.

[0033] As Figure 2-Figure 3 shown in the figure, rolling element retaining portions 3 are provided on the surfaces of the two support portions 1 away from the elastic deformation portion 2, and a slider mating portion 4 is provided at the middle of the outer end surface of the rolling element retaining portion 3 to achieve interference fit with the slider.

[0034] The rolling element retaining portion 3 is provided with a first mating surface 31 and a second mating surface 32. Among them, the second mating surface 32 is the end surface of the support portion 1, and the first mating surface 31 is used to support the rolling elements inside the slider. The first mating surface 31 is formed by inclined machining of the second mating surface 32 towards the upper plane and the lower plane of the support portion 1, and the first mating surface 31 is symmetrically connected to the second mating surface with the second mating surface 32 as the center.

[0035] The slider mating portion 4 is provided on the second mating surface 32 of the rolling element retaining portion 3, and is arranged along the axial direction of the rolling element retaining portion 3 as a middle convex arc or a gradually changing multi-segment line structure with the thickness gradually decreasing from the middle to both sides. Embodiment Two

[0036] As Figure 4 shown in the figure, the elastic deformation portion 2 can be set into multiple elastic structures. For sliders of different sizes, different force application requirements can be achieved by adjusting the number of the elastic deformation portions 2.

[0037] As Figure 5-Figure 6 shown in the figure, the false rails in Embodiment One and Embodiment Two of this embodiment can replace the guide rails and be assembled inside the slider. The false rail is assembled inside the slider 5. The first mating surface 31 of the false rail contacts the rolling elements 6 to support the rolling elements 6 and prevent them from falling off; among them, the rolling elements 6 can be ball bearings or cylindrical rollers. In order to be applicable to various rolling element 6 structures and strengthen the fixing strength of the rolling elements 6, the first mating surface 31 can be machined with an inclined surface or an arc surface adapted to the ball bearings. The slider mating portions 4 at both ends of the false rail are clamped on the inner wall of the slider 5 to prevent the false rail from falling off.

[0038] For the convenience of transportation, the false rail is inserted along the axial direction of the slider 5 between the rolling elements 6 on both sides inside the slider 5, replacing the guide rail and being assembled inside the slider to fix the rolling elements 6 and prevent the rolling elements 6 from falling off. In order to make it easier for the false rail to be inserted into the slider 5, guiding portions are respectively formed by inward extension of the outer side surfaces corresponding to both ends of the rolling element retaining portion 3 of the false rail.

[0039] In order to enable the false rail to be firmly engaged with the slider by itself and not slide out of the slider, the dimensions of the false rail and the slider satisfy the following relationship: a < L < A; where, the distance between the inner walls on both sides of the slider 5 is L, the distance between the second engaging surfaces 32 at both ends of the false rail is a, and the maximum dimension distance of the slider engaging portions 4 at both ends of the false rail is A. The purpose is that when the false rail is inserted into the slider 5, the dimensions a < L at both ends of the false rail make it easy to insert the false rail into the slider 5; the dimension L < A in the middle of the false rail makes the slider engaging portions 4 of the false rail elastically deform the elastic deformation portion 2 of the false rail under the extrusion of the inner wall of the slider 5, and the false rail is more firmly held inside the slider 5, and even under external forces and impacts, it will not slide out and fall off from the slider 5, further ensuring the holding force of the false rail for the rolling elements 6.

[0040] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A false track, characterized in that: Comprising: Two support parts (1) for maintaining the positions of the rolling elements on the corresponding two sides inside the slider; An elastic deformation part (2) located between the two support parts (1) to achieve elastic connection between the two; Wherein, on one side of the support part (1) away from the elastic deformation part (2), a rolling element holding part (3) is provided, and a slider fitting part (4) is provided at the middle of the rolling element holding part (3) to achieve interference fit with the slider.

2. A false rail according to claim 1, characterized in that: Grooves are respectively formed on the upper and lower surfaces of the elastic deformation part (2), and the two grooves are distributed in a staggered manner.

3. A false rail according to claim 2, characterized in that: One or more of the elastic deformation parts (2) are provided between the two support parts (1).

4. A false rail according to claim 1, characterized in that: The rolling element holding part (3) is provided with a second mating surface (32) and a first mating surface (31) for supporting the rolling elements inside the slider, and the second mating surface (32) is connected to the first mating surface (31).

5. A false rail according to claim 4, characterized in that: The first mating surface (31) is an inclined surface or a circular arc surface.

6. A false rail according to claim 4, characterized in that: The slider fitting part (4) is provided on the second mating surface (32).

7. A false rail according to claim 6, characterized in that: The slider fitting part (4) is a middle-convex circular arc or a gradually changing multi-segment line structure.

8. The false rail according to claim 4, characterized in that: Guide parts are respectively formed by inward extension at both ends of the rolling element holding part (3).

9. The false rail according to any one of claims 1 to 8, characterized in that: The dummy rail can be assembled inside the slider instead of the guide rail.

10. The false rail according to claim 9, characterized in that: The dimensions of the dummy rail and the slider satisfy the following relationship: a < L < A, where L is the distance between the inner walls on both sides of the slider (5), a is the distance between the second mating surfaces (32) at both ends of the dummy rail, and A is the maximum distance between the slider fitting parts (4) at both ends of the dummy rail.

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