Miniature inner sliding guide rail

Abstract

The utility model discloses a miniature inner sliding guide rail, and belongs to the technical field of translation mechanisms. A miniature inner sliding guide rail comprises a guide rail seat and a pulley mechanism connected to the guide rail seat in a sliding mode, the pulley mechanism comprises a sliding table, and an eccentric disc is rotationally connected to the central axis of the sliding table; the first guide wheel is installed on the eccentric disc, the axis of the first guide wheel and the central axis of the sliding table are staggered, limiting rods are installed in the guide rail base, and the first guide wheel is arranged between the two limiting rods; the contact distance between the first guide wheel and the limiting rod is achieved through the eccentric disc capable of deviating on the sliding table, so that the sliding position of the sliding table on the guide rail base is controlled or the sliding precision of the sliding table on the same position on the guide rail base is controlled to be unchanged, and precision reduction caused by abrasion is avoided. And high cost and calibration cost caused by frequent replacement of accessories are also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of translation mechanisms, in particular to a micro internal sliding guide rail. Background Art

[0002] A guide rail is a device made of metal or other high-strength materials. Its main function is to support, fix and guide a moving component or device to move along a predetermined path, while reducing friction during movement. They are widely used in various mechanical equipment, especially in occasions requiring high-precision linear motion, such as machine tools, automation equipment, precision measuring instruments, etc. Among them, the linear guide rail is a common type of guide rail, designed specifically for linear reciprocating motion. Compared with traditional sliding bearings, it can bear higher loads, provide more stable linear motion, and still maintain high precision under high loads.

[0003] In the prior art, during the use of a linear guide rail, after its moving part runs for a long time, its own wear is likely to cause a reduction in precision. The common method is to replace parts, but the cost is high and the replacement is troublesome. For this reason, we propose a micro internal sliding guide rail. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem of reduced precision of the moving part of the guide rail in the prior art after long-term use, and to propose a micro internal sliding guide rail.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A micro internal sliding guide rail includes a guide rail base and a trolley mechanism slidably connected to the guide rail base. The trolley mechanism includes: a slide table, on the central axis of which an eccentric disk is rotatably connected; a first guide wheel installed on the eccentric disk, and the axis of the first guide wheel is offset from the central axis of the slide table. Among them, a limiting rod is installed in the guide rail base, and the first guide wheel is arranged between the two limiting rods.

[0007] Preferably, a cylindrical groove is formed in the center of the slide table, the eccentric disk is installed in the cylindrical groove, and the axis of the eccentric disk is offset from the axis of the cylindrical groove.

[0008] In order to ensure the smoothness of operation, preferably, a second guide wheel is installed on the slide table, and two groups of second guide wheels are symmetrically arranged on both sides of the first guide wheel.

[0009] In order to reduce wear, preferably, a guide cavity is formed in the guide rail base, the first guide wheel and the limiting rod are both arranged in the guide cavity. Among them, an installation groove is formed in the guide cavity, and the limiting rod is in interference fit with the installation groove.

[0010] Preferably, drive seats are arranged at both ends of the guide rail seat. A roller is rotatably connected inside the drive seat. Two groups of rollers are rotationally connected by a conveyor belt. Among them, locking blocks are fixedly connected to both ends of the sliding table, and both ends of the conveyor belt are fixedly connected to the sliding table through the locking blocks.

[0011] Furthermore, a transmission cavity is formed inside the guide rail seat, and the conveyor belt passes through the transmission cavity.

[0012] Compared with the prior art, the present utility model provides a micro internal sliding guide rail, which has the following beneficial effects:

[0013] 1. For this micro internal sliding guide rail, by rotating the position of the axis of the eccentric disk around the axis of the cylindrical groove, the contact distance between the circumferential surface of the first guide wheel and the limiting rod is adjusted, so as to always keep the sliding path of the sliding table on the guide rail seat unchanged;

[0014] 2. For this micro internal sliding guide rail, by providing an installation groove in the guiding cavity, the limiting rod is in interference fit with the installation groove, ensuring the integrity of the limiting rod and the guide rail seat, improving the working precision. And the material of the limiting rod is preferably steel to ensure higher strength, and the material of the guide rail seat is preferably aluminum, which is lighter and easier to produce;

[0015] 3. For this micro internal sliding guide rail, both ends of the conveyor belt are fixedly connected to the sliding table through the locking blocks respectively, so as to ensure that when the rollers rotate, the conveyor belt can effectively drive the sliding table to operate.

[0016] Parts not involved in this device are the same as or can be implemented by the prior art. The present utility model realizes the contact distance between the first guide wheel and the limiting rod through an eccentric disk that can be offset on the sliding table, thereby controlling the position of the sliding table when sliding on the guide rail seat or controlling the unchanged precision of the sliding table sliding at the same position on the guide rail seat, thus avoiding the reduction of precision due to wear and also avoiding the high costs of frequently replacing accessories and calibration costs. Brief Description of the Drawings

[0017] Figure 1 is a perspective view of a micro internal sliding guide rail proposed by the present utility model;

[0018] Figure 2 is a partial perspective view of a micro internal sliding guide rail proposed by the present utility model;

[0019] Figure 3 is a partial perspective cross-sectional view of a micro internal sliding guide rail proposed by the present utility model;

[0020] Figure 4 is a plane cross-sectional view of a micro internal sliding guide rail proposed by the present utility model.

[0021] In the figure: 1, guide rail seat; 2, drive seat; 3, conveyor belt; 4, roller; 5, locking block; 6, slide; 7, first guide wheel; 8, eccentric disc; 9, second guide wheel; 10, limit rod. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] Embodiment:

[0025] Referring to Figures 1 - 4 , a micro internal sliding guide rail includes a guide rail seat 1 with a quadrilateral cross-section, here a square structure, and a trolley mechanism slidably connected to the guide rail seat 1. The trolley mechanism includes: a cuboid slide 6, and an eccentric disc 8 is rotatably connected on the central axis L1 of the slide 6; a first guide wheel 7 is installed on the eccentric disc 8, and the axis L2 of the first guide wheel 7 is offset from the central axis L1 of the slide 6. Specifically, the axis L2 revolves around the axis L1, and the two axes do not coincide. In addition, a limit rod 10 made of a material different from that of the guide rail seat 1 is installed in the guide rail seat 1. The first guide wheel 7 is arranged between the two limit rods 10. It can be seen from the cross-section of the first guide wheel 7 that the surface in contact with the limit rod 10 is an inner concave arc surface to better fit the outer convex arc surface of the limit rod 10 and ensure the accuracy of the slide 6 during the movement process.

[0026] In the above scheme design, the linear guide rail realizes the contact distance between the first guide wheel 7 and the limit rod 10 through the eccentric disc 8 that can be offset on the slide 6, so as to control the position of the slide 6 when sliding on the guide rail seat 1 or control the accuracy of the slide 6 sliding at the same position on the guide rail seat 1 to remain unchanged, thereby avoiding the reduction of accuracy due to wear and also avoiding the high cost of frequently replacing parts and the calibration cost.

[0027] Specifically, a cylindrical groove is formed in the center of the sliding table 6, that is, the axis of the cylindrical groove coincides with the central axis L1 of the sliding table 6. The eccentric disc 8 is installed in the cylindrical groove. The axis of the position where the first guide wheel 7 is installed on the eccentric disc 8 coincides with the axis L2 of the first guide wheel 7. At this time, the axis of the eccentric disc 8 is also offset from the axis of the cylindrical groove, and an interference fit is also provided between the eccentric disc 8 and the cylindrical groove. Only by using tools can the axis of the eccentric disc 8 be rotated around the axis of the cylindrical groove. When the position is changed, that is, the contact distance between the circumferential surface of the first guide wheel 7 and the limiting rod 10 is adjusted, so as to always keep the sliding path of the sliding table 6 on the guide rail seat 1 unchanged.

[0028] In addition, a second guide wheel 9 is installed on the sliding table 6. The two groups of second guide wheels 9 are symmetrically arranged on both sides of the first guide wheel 7, mainly to ensure the stability of both ends of the sliding table 6 during operation, and the material of each guide wheel is steel or plastic structure.

[0029] A guiding cavity is formed in the guide rail seat 1. The first guide wheel 7 and the limiting rod 10 are both arranged in the guiding cavity. Among them, an installation groove is formed in the guiding cavity, and the limiting rod 10 is in interference fit with the installation groove to ensure the integrity of the limiting rod 10 and the guide rail seat 1 and improve the working accuracy. The material of the limiting rod 10 is preferably steel to ensure higher strength, and the material of the guide rail seat 1 is preferably aluminum, which is lighter and easier to produce.

[0030] Driving seats 2 are arranged at both ends of the guide rail seat 1. A roller 4 is rotatably connected in the driving seat 2. The shaft of the roller 4 can be controlled to rotate forward and backward by an external motor. The two groups of rollers 4 are rotationally connected by a conveyor belt 3. Among them, locking blocks 5 are connected to both ends of the sliding table 6 by screws, and both ends of the conveyor belt 3 are fixedly connected to the sliding table 6 through the locking blocks 5 respectively, so as to ensure that when the roller 4 rotates, the conveyor belt 3 can effectively drive the sliding table 6 to operate.

[0031] In addition, a transmission cavity is formed in the guide rail seat 1, and the conveyor belt 3 passes through the transmission cavity, so as to play a certain protective role for the conveyor belt 3.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A miniature inner sliding guide rail, comprising a guide rail seat (1) and a pulley mechanism slidably connected to the guide rail seat (1), characterized in that: The pulley mechanism includes: A slide table (6), wherein an eccentric disk (8) is rotatably connected to the central axis of the slide table (6); A first guide wheel (7) is mounted on an eccentric disk (8), and the axis of the first guide wheel (7) is offset from the central axis of the slide table (6). Wherein, a limit rod (10) is installed in the guide rail seat (1), and the first guide wheel (7) is arranged between the two limit rods (10).

2. A micro inner slide guide rail according to claim 1, characterized in that: A cylindrical groove is provided at the center of the slide (6), the eccentric disc (8) is installed in the cylindrical groove, and the axis of the eccentric disc (8) is staggered with the axis of the cylindrical groove.

3. A micro inner slide guide rail according to claim 1, characterized in that: The slide (6) is provided with a second guide wheel (9), and two groups of second guide wheels (9) are symmetrically arranged on both sides of the first guide wheel (7).

4. The micro inner slide guide rail according to claim 1, characterized in that: A guide cavity is formed in the guide rail seat (1), and the first guide wheel (7) and the limiting rod (10) are both arranged in the guide cavity. A mounting groove is provided in the guide cavity, and the limiting rod (10) is interference-fitted with the mounting groove.

5. The micro inner slide guide rail according to claim 1, characterized in that: Transmission seats (2) are provided at both ends of the guide rail seat (1), rollers (4) are rotatably connected inside the transmission seat (2), and two sets of rollers (4) are rotatably connected via a conveyor belt (3). Wherein, both ends of the slide (6) are fixedly connected with locking blocks (5), and both ends of the conveyor belt (3) are fixedly connected to the slide (6) through the locking blocks (5).

6. A micro inner sliding guide rail according to claim 5, characterized in that: A conveying cavity is provided in the guide rail seat (1), and the conveyor belt (3) passes through the conveying cavity.

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