Crawling prevention structure of slide rail retainer

Abstract

The invention provides a creeping prevention structure of a sliding rail retainer. The creeping prevention structure comprises a first sliding rail, a second sliding rail and the retainer, the first sliding rail and the second sliding rail extend along a movement direction, a first opposite side of the first sliding rail is opposite to a second opposite side of the second sliding rail, and the first opposite side and the second opposite side are concavely provided with a first rail surface and a second rail surface; the retainer extends along the movement direction and is provided with a plurality of rolling bodies, and the rolling bodies roll on the first rail surface and the second rail surface, so that the retainer, the first sliding rail and the second sliding rail move relative to each other. The retainer is pivoted with a tooth-shaped wheel, a plurality of first and second bulges are fixedly arranged on the first and second opposite sides outside the first and second track surfaces at intervals, the first and second bulges are positioned on the opposite sides of the tooth-shaped wheel on the circumference, and the tooth-shaped wheel is meshed with the first and second bulges; and the retainer is prevented from creeping on the first sliding rail and the second sliding rail.

Description

Technical Field

[0001] The present invention relates to a structure for preventing a slide rail retainer from creeping, and more particularly to an invention in which a rolling element retainer of a limited stroke slide rail is meshed with a plurality of protrusions sequentially planted on the slide rail in the direction of motion through a toothed wheel to prevent the retainer from creeping on the slide rail, wherein the plurality of protrusions are respectively planted on opposite sides of two relative slide rails facing each other and are not located in the track where the rolling element rolls, thereby improving the rigidity and load of the slide rail. Background Art

[0002] The limited stroke slide includes two fixed-length slides that can move relative to each other, and a sliding member that can assist the relative movement of the two fixed-length slides is arranged between the two fixed-length slides. The sliding member includes a retainer of a specific length and a plurality of rolling bodies arranged at intervals by the retainer. The rolling bodies roll on the slide surface and bear the load. Limited stroke slides are generally used in processing processes with a short moving distance.

[0003] In order to prevent the retainer from creeping relative to the two fixed-length slide rails (such as offset sliding) when the limited-stroke slide rail moves, a toothed wheel is generally provided on the retainer, and the two fixed-length slide rails are respectively provided with tooth grooves extending along the direction of movement for the toothed wheel to engage with, thereby enabling the retainer to move in a fixed relative position.

[0004] Please refer to Korean Patent No. KR1020210101906A "Cross roller bearing with retainer anti-creep function", in which a toothed wheel 150 is provided on the rolling element retainer 120, and a tooth groove 160 for meshing with the toothed wheel 150 is provided on the inner surface of the sliding groove of the slide rail 110 for accommodating the rolling element retainer 120.

[0005] In the above-mentioned Korean Patent No. KR1020210101906A, since a sliding groove is provided on the slide rail 110, the position of the sliding groove is a thinner part of the slide rail 110. When a tooth groove 160 for the toothed wheel 150 to engage is provided in the sliding groove, the rigidity of the slide rail 110 is further reduced, thereby reducing the load of the slide rail 110.

[0006] Please refer to Taiwan Patent No. 200912155A “Linear Motion Device”, in which a gear 261 is provided on the roller holding unit 250, and an external rack 230 / 240 is fixed in the groove 214 / 224 of the slide rail 210 / 220 for accommodating the roller holding unit 250 through a rack fixing member 212 / 222.

[0007] In the aforementioned Taiwan Patent No. 200912155A, in addition to fixing the rack rails 230 / 240 at the thinner grooves 214 / 224 of the slide rails 210 / 220, which reduces the rigidity and load of the slide rails 210 / 220, the external rack rails 230 / 240 may also be loose and may cause vibrations in the operation of the slide rails 210 / 220.

[0008] Please refer to PCT Patent No. WO2020118770A1 "Cross Roller Guide", in which a first rack 21 is formed on the second guide rail 2 and a second rack 31 is formed on the retainer 3, and an integrally concentric first gear 11 and a second gear 12 are pivotally connected to the rotating mounting hole 15 of the first guide rail 1 through a rotating shaft 13. This achieves the effect that the aforementioned retainer can move at a fixed relative position.

[0009] In the above-mentioned PCT Patent No. WO2020118770A1, as in this case Figure 2 As shown, the concentric first gear 11, the second gear 12, the rotating shaft 13, and the rotating mounting hole 15 are all exposed on the top surface of the first guide rail 1. Therefore, during movement, external oil, dirt, and dust are easily stuck between the first gear 11, the second gear 12 and the rotating shaft 13, or between the rotating shaft 13 and the rotating mounting hole 15, causing the first gear 11 and the second gear 12 to rotate unsmoothly. In addition, the top surfaces of the first guide rail 1 and the second guide rail 2 are not at the same height to form a step difference, which also affects the installation of the workpiece. Summary of the invention

[0010] Based on the above-mentioned shortcomings of the previous case, the object of the present invention is to provide a slide rail retainer to prevent creeping.

[0011] The present invention provides a slide rail retainer anti-creep structure, comprising:

[0012] A first slide rail extends along a movement direction and includes a first relative side, and a first track surface is recessed on the first relative side along the movement direction. A second slide rail extends along the movement direction and includes a second relative side, and a second track surface is recessed on the second relative side along the movement direction, and the first relative side and the second relative side face each other. A retainer extends along the movement direction and is provided with a plurality of rolling bodies that can roll along the movement direction, and the rolling bodies roll on the first track surface and the second track surface, so that the retainer, the first slide rail and the second slide rail move relative to each other;

[0013] The retainer is also pivotally connected to a rotatable toothed wheel. A plurality of first protrusions are planted at fixed intervals along the movement direction on the first opposite side outside the first track surface. A plurality of second protrusions are planted at fixed intervals along the movement direction on the second opposite side outside the second track surface. The first protrusion and the second protrusion are respectively arranged on opposite sides of the toothed wheel on the circumference, and the toothed wheel is respectively engaged with the first protrusion and the second protrusion to prevent the retainer from creeping on the first slide rail and the second slide rail.

[0014] Furthermore, there is a gap between the first relative side and the second relative side, the first protrusion protrudes toward the second relative side, the second protrusion protrudes toward the first relative side, and the protrusion length of the first protrusion and the protrusion length of the second protrusion are both smaller than the gap.

[0015] Furthermore, the first protrusion and the second protrusion are both cylinders.

[0016] Furthermore, the plurality of first protrusions are respectively implanted in the plurality of first circular holes on the first opposite side, and the plurality of second protrusions are respectively implanted in the plurality of second circular holes on the second opposite side.

[0017] Furthermore, the movement direction is a straight line or an arc.

[0018] Furthermore, the retainer is provided with a receiving space, in which a shaft body is provided, the toothed wheel is pivotally connected to the shaft body in the receiving space, and a part of the toothed wheel is exposed outside the retainer.

[0019] The following effects can be achieved according to the above technical features:

[0020] 1. Compared with the previous case, the rack of the toothed wheel for engaging the retainer is set in the sliding groove of the slide rail, wherein the rack is further processed and formed directly in the sliding groove, which reduces the rigidity of the slide rail and also reduces the load capacity of the slide rail. In the present invention, the first protrusion of the toothed wheel for engaging the retainer of the first slide rail is set on the first opposite side and not located on the first track surface, and the second protrusion of the toothed wheel for engaging the retainer of the second slide rail is set on the second opposite side and not located on the second track surface, wherein the first track surface and the second track surface are not further processed to form a rack part, and the integrity of the first track surface and the second track surface is completely preserved, thereby making the first slide rail and the second slide rail have better rigidity and withstand higher loads.

[0021] 2. The first protrusion of the first slide rail of the present invention is planted in the first circular hole outside the first track surface, and the second protrusion of the second slide rail is planted in the second circular hole outside the second track surface. The processing method of the present invention of "planting outside the track surface" is not restricted in the operation space of planting, and planting is easy to carry out; while the prior art of "processing the rack inside the track surface" has a very limited processing space and is not easy to implement. The present invention has the effect of easy processing.

[0022] 3. The first circular hole and the second circular hole of the present invention are located far away from the first track surface and the second track surface. The first circular hole and the second circular hole will not affect the rigidity of the first track surface and the second track surface at all. At the same time, the first circular hole and the second circular hole are located outside the first track surface and the second track surface. Therefore, the first circular hole and the second circular hole can have a sufficient hole depth, and provide a better fixing effect for the first protrusion and the second protrusion without the problem of looseness.

[0023] 4. The present invention sets a receiving space in the retainer, and the shaft of the pivotally mounted toothed wheel is set in the receiving space. After the toothed wheel is installed, only a part of it is exposed in the retainer, so oil, dirt and dust are not easy to enter the receiving space and interfere with the rotation of the toothed wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A It is a three-dimensional exploded view of the anti-creep structure of the slide rail retainer of the present invention.

[0025] Figure 1B This is a schematic diagram showing that the first opposite side of the first slide rail and the second opposite side of the second slide rail in the anti-creep structure of the slide rail holder of the present invention face each other.

[0026] Figure 2 It is a three-dimensional combination diagram of the anti-creep structure of the slide rail retainer of the present invention.

[0027] Figure 3 Schematic diagram of the toothed wheel of the retainer respectively engaging with the first protrusion and the second protrusion in an embodiment of the present invention.

[0028] Figure 4 for Figure 2 sectional view of .

[0029] Figure 5 This is a schematic diagram of an embodiment of the present invention, in which the first protrusion of the first slide rail is implanted in the first circular hole, and the second protrusion of the second slide rail is implanted in the second circular hole.

[0030] Explanation of the reference numerals: 1-first slide rail; 11-first opposite side; 12-first track surface; 13-first protrusion; 14-first circular hole; 2-second slide rail; 21-second opposite side; 22-second track surface; 23-second protrusion; 24-second circular hole; 3-retainer; 31-rolling body; 32-toothed wheel; 33-accommodating space; 34-shaft body; D-movement direction; d-gap. DETAILED DESCRIPTION

[0031] The following embodiments are only used to assist in explaining the anti-creep structure of the slide rail retainer of the present invention, and are not intended to limit the present invention.

[0032] See also Figure 1A , Figure 1B and Figure 2 As shown, this embodiment includes a first slide rail 1, a second slide rail 2 and a retainer 3, wherein:

[0033] The first slide rail 1 extends along a movement direction D, and includes a first relative side 11, and a first track surface 12 is recessed on the first relative side 11 along the movement direction D. The second slide rail 2 extends along the movement direction D, and includes a second relative side 21, and a second track surface 22 is recessed on the second relative side 21 along the movement direction D. The first relative side 11 and the second relative side 21 face each other, that is, the first relative side 11 faces the second slide rail 2, and the second relative side 21 faces the first slide rail 1, wherein the first track surface 12 recessed on the first relative side 11 and the second track surface 22 recessed on the second relative side 21 are both for the rolling of the rolling body 31 described later. The retainer 3 extends along the movement direction D, and a plurality of rolling bodies 31 are provided along the movement direction D. The rolling bodies 31 described in this embodiment are rollers arranged at 90 degrees and rolling on the first track surface 12 and the second track surface 22, so that the retainer 3, the first slide rail 1 and the second slide rail 2 can move relative to each other along the movement direction D. The movement direction D can be a straight line or an arc according to the requirements of the process.

[0034] See also Figures 1A to 3As shown, the retainer 3 is pivotally connected to a rotatable toothed wheel 32. A plurality of first protrusions 13 are planted at fixed intervals along the movement direction D on the first opposite side 11 outside the first track surface 12, and a plurality of second protrusions 23 are planted at fixed intervals along the movement direction D on the second opposite side 21 outside the second track surface 22. The toothed wheel 32 is respectively engaged with the first protrusion 13 and the second protrusion 23 to prevent the retainer 3 from creeping on the first slide rail 1 and the second slide rail 2, and to make the first slide rail 1 and the second slide rail 2 have better rigidity and can withstand higher loads. In this embodiment, the first protrusion 13 and the second protrusion 23 are both cylindrical, which is conducive to smooth guidance of the toothed wheel 32.

[0035] See also Figure 3 and Figure 4 As shown, in the embodiment, the first protrusion 13 is located at the upper edge of the first opposite side 11 of the first slide rail 1, and the second protrusion 23 is located at the lower edge of the second opposite side 21 of the second slide rail 2, so that the first protrusion 13 and the second protrusion 23 are respectively arranged on the opposite sides of the toothed wheel 32 on the circumference and mesh with each other. In the present embodiment, there is a gap d between the first opposite side 11 of the first slide rail 1 and the second opposite side 21 of the second slide rail 2, the first protrusion 13 protrudes toward the second opposite side 21, and the protruding length of the first protrusion 13 is smaller than the gap d, and the second protrusion 23 protrudes toward the first opposite side 11, and the protruding length of the second protrusion 23 is also smaller than the gap d, so as to avoid the first protrusion 13 and the second protrusion 23 from colliding when the first slide rail 1 and the second slide rail 2 move relative to each other. For the retainer 3, the present embodiment is as follows Figure 4 As shown, it is composed of two half retainers connected together, but is not limited to this. It can also be made into an integral shape according to the mold design. The retainer 3 is provided with a accommodating space 33, and a shaft body 34 is provided in the accommodating space 33. The toothed wheel 32 is pivotally connected to the shaft body 34 in the accommodating space 33, and only a part of the toothed wheel 32 is exposed from the retainer 3, which can reduce the influence of oil and dust on the rotation of the toothed wheel 32.

[0036] See also Figure 4 and Figure 5 As shown, the plurality of first protrusions 13 of this embodiment are respectively planted in the plurality of first circular holes 14 of the first opposite side 11 of the first slide rail 1. Similarly, the plurality of second protrusions 23 are respectively planted in the plurality of second circular holes 24 of the second opposite side 21 of the second slide rail 2 (since the second slide rail 2 is symmetrically arranged with the first slide rail 1, the first slide rail 1 can be turned 180 degrees to serve as the second slide rail 2 during manufacturing, so Figure 5The first slide rail 1 and the second slide rail 2 are marked at the same time. Further, the first protrusion 13 and the second protrusion 23 can be coated with glue and then implanted in the first circular hole 14 and the second circular hole 24 respectively. In this way, the first protrusion 13 can be more firmly arranged on the first slide rail 1 and is not easy to loosen, and the second protrusion 23 can be more firmly arranged on the second slide rail 2 and is not easy to loosen.

[0037] Based on the description of the above embodiments, one should be able to fully understand the operation, use and effects of the present invention. The above embodiments are only preferred embodiments of the present invention and should not be used to limit the scope of implementation of the present invention. That is, all simple equivalent changes and modifications made based on the contents of the present invention are within the scope of the present invention.

Claims

1. A slide rail retainer anti-creep structure, characterized in that: include: A first slide rail extends along a movement direction and includes a first opposite side, wherein a first track surface is concavely formed on the first opposite side along the movement direction; A second slide rail extending along the moving direction and comprising a second opposite side, the second opposite side being concavely provided with a second track surface along the moving direction, the first opposite side and the second opposite side facing each other; A retainer extends along the movement direction and is provided with a plurality of rolling bodies that can roll along the movement direction. The rolling bodies roll on the first track surface and the second track surface, so that the retainer, the first slide rail and the second slide rail move relative to each other. The retainer is also pivotally connected to a rotatable toothed wheel; A plurality of first protrusions are planted at fixed intervals along the moving direction on the first opposite side outside the first track surface; A plurality of second protrusions are planted at fixed intervals along the moving direction on the second opposite side outside the second track surface; The first protrusion and the second protrusion are respectively arranged on opposite sides of the toothed wheel on the circumference, and the toothed wheel is respectively engaged with the first protrusion and the second protrusion to prevent the retainer from creeping on the first slide rail and the second slide rail.

2. The anti-creep structure of the slide rail retainer according to claim 1, characterized in that: There is a gap between the first relative side and the second relative side, the first protrusion protrudes toward the second relative side, the second protrusion protrudes toward the first relative side, and the protrusion length of the first protrusion and the protrusion length of the second protrusion are both smaller than the gap.

3. The anti-creep structure of the slide rail retainer according to claim 1, characterized in that: The first protrusion and the second protrusion are both cylindrical.

4. The anti-creep structure of the slide rail retainer according to claim 1, characterized in that: The plurality of first protrusions are respectively implanted in the plurality of first circular holes on the first opposite side, and the plurality of second protrusions are respectively implanted in the plurality of second circular holes on the second opposite side.

5. The anti-creep structure of the slide rail retainer according to claim 1, characterized in that: The direction of movement is a straight line or an arc.

6. The anti-creep structure of the slide rail retainer according to claim 1, characterized in that: The retainer is provided with a receiving space, in which a shaft body is provided, the toothed wheel is pivotally connected to the shaft body in the receiving space, and a part of the toothed wheel is exposed outside the retainer.

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