High-stability rolling guide device with self-lubricating function

Abstract

This utility model relates to the field of ball spline technology and discloses a high-stability rolling guide device with self-lubricating function. It includes a housing, a guide fixedly connected to the inner wall of the housing, an installation mechanism inside the guide, a spline shaft fixedly connected to the inner wall of the guide, and a guide mechanism outside the spline shaft. The guide mechanism includes an upper cover, the inner wall of which is slidably connected to the upper middle part of the outer wall of the spline shaft, a lower cover bottom structure slidably connected to the lower middle part of the spline shaft, and a lower cover top structure slidably connected to the top of the lower cover bottom structure. Multiple protrusions are fixedly connected to the inner walls of both the upper cover and the lower cover bottom structure. In this utility model, the third and fourth sliding grooves have a certain inclination, allowing the high-speed running balls to smoothly bend and turn, reducing the impact on the upper and lower covers, averaging the force at each stage, and reducing the pushing phenomenon during high-speed operation of the device.

Description

Technical Field

[0001] This utility model relates to the field of ball spline technology, and in particular to a highly stable rolling guide device with self-lubricating function. Background Technology

[0002] A ball spline is a precision transmission component that combines rotary and linear motion. It transmits force and guides motion by rolling balls between the spline shaft and the spline sleeve. With its high precision, high rigidity and low coefficient of friction, it is used in fields that require high-precision linear reciprocating motion and rotary motion to work together, providing important transmission support for the efficient and stable operation of various mechanical systems.

[0003] Traditional ball splines consist of a spline shaft, a spline sleeve, balls, and a circulation assembly. During use, when the spline sleeve moves linearly or rotates relative to the spline shaft, the balls roll within the raceways of the spline shaft and spline sleeve, transmitting force. The circulation assembly guides the balls to enter the circulation channel after they reach the end of the raceway, enabling the balls to be recycled. However, in long-term use, the friction between the balls and the raceways in this traditional structure leads to wear of the components, requiring frequent lubrication to maintain normal operation, which increases maintenance costs and workload.

[0004] To address the inconvenience of traditional ball spline lubrication and maintenance, existing technologies achieve automatic lubrication of the balls and raceways by setting oil storage chambers and oil supply channels in the spline sleeve or circulation assembly, reducing the frequency of manual maintenance. However, in actual use, when the device operates at high speed, the movement speed of the balls in the circulation channel increases. At the moment of entering the raceway, due to the change in movement direction and inertia, the steel balls will cause a strong impact on the baffle at the entrance of the circulation channel and the edge of the raceway. Long-term use will lead to deformation or even damage to these components. When the device frequently reciprocates over a short distance, the balls cannot completely separate during the circulation process and will push against each other. Therefore, a high-stability rolling guide device with self-lubricating function is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a highly stable rolling guide device with self-lubricating function, which aims to improve the problem of damage caused by the impact of the balls on related components and the pushing phenomenon during high-speed operation in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-stability rolling guide device with self-lubricating function, comprising a housing, a guide fixedly connected to the inner wall of the housing, an installation mechanism provided inside the guide, a spline shaft slidably connected to the inner wall of the guide, and a guide mechanism provided outside the spline shaft;

[0007] The guiding mechanism includes an upper cover, the inner wall of which is slidably connected to the upper middle part of the outer wall of the spline shaft. The lower middle part of the spline shaft is slidably connected to a lower cover bottom structure. The top of the lower cover bottom structure is slidably connected to a lower cover top structure. The inner walls of both the upper cover and the lower cover bottom structure are fixedly connected with multiple protrusions. The outer wall of the guide has multiple first sliding grooves. The inner wall of the guide has multiple second sliding grooves. The top of the lower cover bottom structure has multiple third sliding grooves. The bottom of the upper cover has multiple fourth sliding grooves. The inner walls of the multiple second sliding grooves are slidably connected with multiple balls. The outer wall of the spline shaft has multiple sliding grooves. The inner wall of the upper cover has multiple oil storage cavities. A guiding component is provided on the outside of the guide.

[0008] As a further description of the above technical solution:

[0009] The installation mechanism includes two first bolts, the outer walls of which are threaded to the inner wall of the upper cover. The outer wall of the guide has multiple connecting holes. The outer wall of the top structure of the lower cover has two upper holes. The outer wall of the bottom structure of the lower cover has two lower holes. The inner walls of the two lower holes are threaded to second bolts. The bottom of the top structure of the lower cover is provided with a positioning component.

[0010] As a further description of the above technical solution:

[0011] The guide assembly includes multiple first protruding rings, the tops of which are fixedly connected to the bottom of the upper cover. Multiple second protruding rings are fixedly connected to the top of the top structure of the lower cover. Multiple grooves are formed on the outer wall of the guide.

[0012] As a further description of the above technical solution:

[0013] The positioning component includes two positioning posts, the top ends of which are fixedly connected to the bottom of the top structure of the lower cover, and two positioning holes are opened on the top of the bottom structure of the lower cover.

[0014] As a further description of the above technical solution:

[0015] The bottom of the upper cover is slidably connected to the top of the guide, and the top of the lower cover top structure is slidably connected to the bottom of the guide.

[0016] As a further description of the above technical solution:

[0017] The bottoms of the first and second slides on the same side are connected to the third slide, and the tops of the first and second slides on the same side are connected to the fourth slide.

[0018] This utility model has the following beneficial effects:

[0019] In this invention, the third and fourth slide grooves have a certain inclination, which allows the high-speed running balls to smoothly bend and turn, reducing the impact on related components and minimizing damage to the upper and lower covers. At the same time, it makes the force even at each stage, reducing the pushing phenomenon when the device is running at high speed. The lubricating oil in the oil storage cavity inside the upper cover penetrates into the second slide groove through the hidden oil channel and is evenly coated on each contact surface as the balls roll, which reduces friction loss at each contact point and extends the service life of the device. Attached Figure Description

[0020] Figure 1 A perspective view of a highly stable rolling guide device with self-lubricating function proposed in this utility model;

[0021] Figure 2 This is an exploded view of a highly stable rolling guide device with self-lubricating function proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the upper cover of a high-stability rolling guide device with self-lubricating function proposed in this utility model.

[0023] Figure 4 This is a partial structural exploded view of a high-stability rolling guide device with self-lubricating function proposed in this utility model;

[0024] Figure 5 This is a schematic diagram of the top structure of the lower cover of a high-stability rolling guide device with self-lubricating function proposed in this utility model.

[0025] Legend:

[0026] 1. Housing; 2. Splined shaft; 3. Guide mechanism; 301. Top cover; 302. Bottom structure of bottom cover; 303. Top structure of bottom cover; 304. Protrusion; 305. First slide groove; 306. Second slide groove; 307. Third slide groove; 308. Fourth slide groove; 309. Ball bearing; 310. Sliding groove; 311. Oil reservoir; 312. Guide assembly; 3121. First convex ring; 3122. Second convex ring; 3123. Groove; 4. Mounting mechanism; 401. First bolt; 402. Connecting hole; 403. Upper hole; 404. Lower hole; 405. Second bolt; 406. Positioning assembly; 4061. Positioning pin; 4062. Positioning hole; 5. Guide. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] See attached document Figure 2 Appendix Figure 3 and attached Figure 4 The present invention provides an embodiment of a high-stability rolling guide device with self-lubricating function, comprising a housing 1, the housing 1 providing rigid support for the overall structure, a guide 5 fixedly connected to the inner wall of the housing 1, the guide 5 serving as the core functional carrier to achieve the guiding function, an installation mechanism 4 provided inside the guide 5 for fixing and positioning various components, a spline shaft 2 slidably connected to the inner wall of the guide 5, and a guide mechanism 3 provided outside the spline shaft 2 to achieve smooth guidance of the spline shaft 2;

[0029] The guiding mechanism 3 includes an upper cover 301, which serves to close and guide. The inner wall of the upper cover 301 is slidably connected to the upper middle part of the outer wall of the spline shaft 2, and the bottom of the upper cover 301 is slidably connected to the top of the guide 5, enabling relative sliding between the upper cover 301 and the guide 5. A lower cover bottom structure 302 is slidably connected to the lower middle part of the spline shaft 2, and a lower cover top structure 303 is slidably connected to the top of the lower cover bottom structure 302. The lower cover top structure 303 and the lower cover bottom structure 302 cooperate to form a complete lower cover. The top of the lower cover top structure 303 is slidably connected to the bottom of the guide 5, enabling relative sliding between the lower cover and the guide 5. Multiple protrusions 304 are fixedly connected to the inner walls of both the upper cover 301 and the lower cover bottom structure 302. Multiple first grooves 305 are provided on the outer wall of the guide 5, multiple second grooves 306 are provided on the inner wall of the guide 5, and multiple second grooves 306 are provided on the top of the lower cover bottom structure 302. The top cover 301 has a number of fourth grooves 308 at the bottom. The bottom of the first groove 305 and the second groove 306 on the same side are connected to the third groove 307, and the top of the first groove 305 and the second groove 306 on the same side are connected to the fourth groove 308, forming a closed loop of the ball 309. The multiple grooves provide rolling channels for the ball 309. The inner walls of the multiple second grooves 306 are slidably connected to multiple balls 309. The balls 309 convert sliding friction into rolling friction. The outer wall of the spline shaft 2 has multiple sliding grooves 310. The sliding grooves 310 and the first groove 305 together form a complete groove. The protrusion 304 engages with the top of the sliding groove 310. The inner wall of the top cover 301 has multiple oil storage cavities 311 for storing lubricating oil. The guide 5 is provided with a guide assembly 312 on the outside. The guide assembly 312 enhances the structural stability.

[0030] The guide assembly 312 includes multiple first protruding rings 3121, the tops of which are fixedly connected to the bottom of the upper cover 301 to fix the first protruding rings 3121 to the upper cover 301. Multiple second protruding rings 3122 are fixedly connected to the top of the lower cover top structure 303. The second protruding rings 3122 are used for positioning the lower cover. Multiple grooves 3123 are provided on the outer wall of the guide 5. The grooves 3123 cooperate with the protruding rings to achieve rapid positioning.

[0031] Specifically, the upper cover 301 is located at the top of the guide 5, and the lower cover bottom structure 302 and the lower cover top structure 303 are located at the bottom of the guide 5, forming a symmetrical guide frame. The ball bearing 309 is the key element for force transmission. When the spline shaft 2 moves relative to the guide 5, the ball bearing 309 rolls in a cycle along multiple sets of sliding grooves. It starts from the second sliding groove 306 and moves downwards, entering the third sliding groove 307 at the top of the lower cover bottom structure 302. After completing the turning, it moves upwards through the first sliding groove 305 on the outer wall of the guide 5, and then returns to the second sliding groove 306 through the fourth sliding groove 308 at the bottom of the upper cover 301, forming a closed loop. The lubricating oil in the oil storage cavity 311 on the inner wall of the upper cover 301 permeates into the second sliding groove 306 through the concealed oil channel, and is evenly coated on each contact surface as the ball bearing 309 rolls, reducing friction loss. The third sliding groove 307 and The fourth chute 308 has an inclination, which allows the high-speed running ball 309 to smoothly bend and turn, reducing the impact on related components, reducing the damage to the upper cover 301 and lower cover from impact, making the force even at each stage, and reducing the pushing phenomenon during high-speed operation. The guide component 312 on the outside of the guide 5 enhances the structural stability. The first convex ring 3121 and the second convex ring 3122 respectively engage with the corresponding grooves 3123, which facilitates the quick positioning of the upper cover 301 and lower cover on the guide 5, realizing the rapid connection of the chute. At the same time, the lateral impact force is offset by multiple sets of concave and convex cooperation, ensuring the structural rigidity of the device during high-speed movement. In addition, the inner wall end face of the guide 5 has a small wave design, which makes the grease or lubricating oil generate intermittent resistance when it is blocked, making the equipment run more smoothly, reducing the decibel level during high-speed operation, and not causing an increase in resistance.

[0032] See attached document Figure 1 Appendix Figure 4 and attached Figure 5 The mounting mechanism 4 includes two first bolts 401. The outer walls of the two first bolts 401 are threaded to the inner wall of the upper cover 301. The first bolts 401 are used to fix the upper cover 301 and the guide 5. The outer wall of the guide 5 is provided with multiple connecting holes 402. The connecting holes 402 provide threaded connection positions for the bolts. The outer wall of the lower cover top structure 303 is provided with two upper holes 403. The outer wall of the lower cover bottom structure 302 is provided with two lower holes 404. The lower holes 404 cooperate with the upper holes 403 to allow the second bolts 405 to pass through. The inner walls of the two lower holes 404 are threaded to the second bolts 405. The second bolts 405 are used to fix the lower cover top structure 303 and the lower cover bottom structure 302. The bottom of the lower cover top structure 303 is provided with a positioning component 406. The positioning component 406 is used for positioning the lower cover top structure 303 and the lower cover bottom structure 302.

[0033] The positioning component 406 includes two positioning posts 4061. The top ends of the two positioning posts 4061 are fixedly connected to the bottom of the top structure 303 of the lower cover. The positioning posts 4061 play a positioning and guiding role. The top of the bottom structure 302 of the lower cover has two positioning holes 4062. The positioning holes 4062 cooperate with the positioning posts 4061 to achieve docking.

[0034] Specifically, during installation, using the splined shaft 2 as a reference, insert it into the guide 5. Align the positioning pin 4061 at the bottom of the lower cover top structure 303 with the positioning hole 4062 at the top of the lower cover bottom structure 302, aligning their grooves. Insert the second bolt 405 through the lower hole 404 and the upper hole 403, into the connecting hole 402 at the bottom of the guide 5, and tighten it with threads to form a complete lower cover assembly. Fit the lower cover assembly into the lower part of the splined shaft 2, so that its top engages with the groove 3123 at the bottom of the guide 5 through the second protruding ring 3122. At this time, do not install the upper cover 301. Directly guide the balls 309 into the second groove 306 on the inner wall of the guide 5. The components are fixed. The bottom of the second slide groove 306 and the third slide groove 307 form a closed channel, which can stably support the ball 309. After the ball 309 is placed, the upper cover 301 is put into the upper part of the spline shaft 2, so that the first convex ring 3121 at its bottom is embedded in the groove 3123 on the outer wall of the guide 5, realizing the docking of the fourth slide groove 308 and the first slide groove 305. The first bolt 401 is inserted into the inner wall of the upper cover 301 and threadedly locked with the connecting hole 402 on the outer top of the guide 5, thus completing the fixing of the upper cover 301. At this time, the protrusions 304 on the inner walls of the upper cover 301 and the bottom structure 302 of the lower cover are embedded in the sliding groove 310 of the spline shaft 2, forming a complete guide structure.

[0035] Working principle: The upper cover 301 is located at the top of the guide 5, and the lower cover bottom structure 302 and lower cover top structure 303 are located at the bottom of the guide 5, forming a symmetrical guide frame. The ball bearing 309 is the key element for force transmission. When the spline shaft 2 moves relative to the guide 5, the ball bearing 309 will circulate along multiple sets of sliding grooves. Starting from the second sliding groove 306, it runs downwards and enters the third sliding groove 307 at the top of the lower cover bottom structure 302. After completing the turn, it runs upwards through the first sliding groove 305 on the outer wall of the guide 5, and then returns to the second sliding groove 306 through the fourth sliding groove 308 at the bottom of the upper cover 301, thus forming a closed loop. The lubricating oil in the multiple oil storage cavities 311 opened on the inner wall of the upper cover 301 permeates into the second sliding groove 306 through the concealed oil passage. As the ball bearing 309 rolls, the lubricating oil... The coating is evenly applied to each contact surface, reducing frictional loss. The third slide groove 307 and the fourth slide groove 308 have a certain inclination. This design allows the high-speed running ball 309 to smoothly make a bend and turn, reducing the impact on related components and reducing the damage caused by the impact of the ball 309 on the upper cover 301 and the lower cover. It can also effectively distribute the force at each stage and reduce the pushing phenomenon during the high-speed operation of the device. In addition, the guide component 312 set on the outside of the guide 5 further enhances the stability of the structure. The first convex ring 3121 and the second convex ring 3122 are respectively inserted into the corresponding grooves 3123. This design facilitates the quick positioning of the upper cover 301 and the lower cover on the guide 5, thereby realizing the rapid connection between the slide grooves. At the same time, the lateral impact force is offset by multiple sets of concave and convex cooperation, ensuring the structural rigidity of the device during high-speed movement.

[0036] Furthermore, the assembly process of the device mounting mechanism 4 is based on the spline shaft 2. The spline shaft 2 is inserted into the guide 5. Then, the positioning pin 4061 at the bottom of the bottom structure 303 of the lower cover is aligned with the positioning hole 4062 at the top of the bottom structure 302 of the lower cover, so that the two slide grooves are aligned. Then, the second bolt 405 is inserted through the lower hole 404 and the upper hole 403 into the connecting hole 402 at the bottom of the guide 5 and threaded to form a complete lower cover assembly. The lower cover assembly is then fitted into the lower part of the spline shaft 2, so that its top is engaged with the groove 3123 at the bottom of the guide 5 through the second convex ring 3122. Then, the ball bearing 309 is introduced. At this time, the upper cover 301 is not installed. The ball bearing 309 is directly introduced into the second slide groove 306 on the inner wall of the guide 5. Since the lower cover assembly is fixed, the bottom of the second slide groove 306 and the third slide groove 307 form a closed channel, which can stably support the ball 309. The ball 309 can be placed without the assistance of the upper cover 301. After the ball 309 is placed, the upper cover 301 is put into the upper part of the spline shaft 2, so that the first protruding ring 3121 at its bottom is embedded in the groove 3123 on the outer wall of the guide 5, realizing the docking of the fourth slide groove 308 and the first slide groove 305. Then, the first bolt 401 is inserted into the connection hole 402 on the inner wall of the upper cover 301 and the outer top of the guide 5 and threaded to lock it, thus completing the fixing of the upper cover 301. At this time, the protrusions 304 on the inner walls of the upper cover 301 and the bottom structure 302 of the lower cover are precisely embedded in the slide groove 310 of the spline shaft 2, forming a complete guide structure.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A highly stable rolling guide device with self-lubricating function, comprising a housing (1), characterized in that: The inner wall of the outer shell (1) is fixedly connected to a guide (5), the inside of the guide (5) is provided with an installation mechanism (4), the inner wall of the guide (5) is slidably connected to a spline shaft (2), and the outside of the spline shaft (2) is provided with a guide mechanism (3). The guide mechanism (3) includes an upper cover (301), the inner wall of which is slidably connected to the upper part of the outer wall of the spline shaft (2), the lower part of which is slidably connected to a lower cover bottom structure (302), the top of which is slidably connected to a lower cover top structure (303), the inner walls of the upper cover (301) and the lower cover bottom structure (302) are both fixedly connected to a plurality of protrusions (304), and the outer wall of the guide (5) is provided with a plurality of first grooves (305). The inner wall of the upper cover (301) is provided with multiple second sliding grooves (306), the top of the bottom structure (302) of the lower cover is provided with multiple third sliding grooves (307), the bottom of the upper cover (301) is provided with multiple fourth sliding grooves (308), the inner walls of the multiple second sliding grooves (306) are slidably connected with multiple balls (309), the outer wall of the spline shaft (2) is provided with multiple sliding grooves (310), the inner wall of the upper cover (301) is provided with multiple oil storage cavities (311), and the guide assembly (312) is provided on the outside of the guide (5).

2. The high-stability rolling guide device with self-lubricating function according to claim 1, characterized in that: The mounting mechanism (4) includes two first bolts (401), the outer walls of which are threaded to the inner wall of the upper cover (301). The outer wall of the guide (5) is provided with multiple connecting holes (402). The outer wall of the lower cover top structure (303) is provided with two upper holes (403). The outer wall of the lower cover bottom structure (302) is provided with two lower holes (404). The inner walls of the two lower holes (404) are threaded to second bolts (405). The bottom of the lower cover top structure (303) is provided with a positioning component (406).

3. A high-stability rolling guide device with self-lubricating function according to claim 1, characterized in that: The guide assembly (312) includes a plurality of first protruding rings (3121), the tops of which are fixedly connected to the bottom of the upper cover (301), and the top of the lower cover top structure (303) is fixedly connected to a plurality of second protruding rings (3122). The outer wall of the guide (5) is provided with a plurality of grooves (3123).

4. A high-stability rolling guide device with self-lubricating function according to claim 2, characterized in that: The positioning component (406) includes two positioning posts (4061), the top ends of which are fixedly connected to the bottom of the top structure (303) of the lower cover, and the top of the bottom structure (302) of the lower cover has two positioning holes (4062).

5. A high-stability rolling guide device with self-lubricating function according to claim 1, characterized in that: The bottom of the upper cover (301) is slidably connected to the top of the guide (5), and the top of the lower cover top structure (303) is slidably connected to the bottom of the guide (5).

6. A high-stability rolling guide device with self-lubricating function according to claim 1, characterized in that: The bottoms of the first slide groove (305) and the second slide groove (306) on the same side are connected to the third slide groove (307), and the tops of the first slide groove (305) and the second slide groove (306) on the same side are connected to the fourth slide groove (308).

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