Novel maintenance-free lead screw
By using plastic oil lubrication technology in the screw system, the problem of frequent lubrication of traditional screw systems is solved, maintenance-free is achieved, maintenance costs and equipment failure risks are reduced, and the stability and durability of the equipment are improved.
Patent Information
- Application Number
- CN202423105877.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Traditional screw systems require frequent lubrication and maintenance, resulting in high maintenance costs and the risk of equipment failure due to improper lubrication.
The plastic oil lubrication technology is adopted. By embedding or coating the plastic oil formed by high molecular polymer material in the track of the screw system, its self-lubricating properties are utilized to form a lubricating film and store lubricating oil to avoid leakage and achieve maintenance-free.
It reduces the risk of environmental pollution, reduces friction and wear, achieves maintenance-free operation, improves the stability and durability of the equipment, and reduces maintenance costs.
Smart Images
Figure CN223331075U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical transmission and lubrication technology, and more specifically, to a maintenance-free lead screw system using plastic oil lubrication technology. This system, through its innovative lubrication method, aims to improve transmission efficiency, reduce maintenance costs, and ensure long-term stable operation of the equipment. Background Art
[0002] Traditional lead screw systems require frequent lubrication and maintenance to ensure proper operation and extend their service life. However, frequent lubrication not only increases maintenance costs but can also lead to equipment failure due to improper lubrication. Therefore, developing a self-lubricating system that can achieve long-term maintenance-free operation is particularly important. Utility Model Content
[0003] In view of the deficiencies in the prior art, the utility model provides a novel maintenance-free lead screw.
[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0005] A novel maintenance-free screw comprises: a screw rod and a nut that cooperate with each other; a first track is provided in the screw rod, a second track is provided on the nut, and the first track or the second track is in contact with plastic oil;
[0006] As another embodiment of the technical solution, it also includes a ball and a return device, the screw rod is a ball screw, the nut is a ball nut, the ball screw, ball nut, ball and return device cooperate with each other; the return device is provided with a third track, at least one of the first track, the second track and the third track contacts the plastic oil, and the material of the return device is metal, non-metal or embedded with plastic oil.
[0007] As another implementation form of this technical solution, the lead screw is a trapezoidal lead screw, and the nut is a trapezoidal nut.
[0008] As another implementation form of the technical solution, the nut is an inner roller nut, the roller nut is provided with a plurality of rollers, plastic oil is provided between the rollers, and the screw rod is a planetary roller screw.
[0009] The body-plasticizing oil is tightly fitted with at least one of the first track, the second track and the third track through an embedding structure. The first track, the second track and the third track are provided with an embedding structure for embedding the body-plasticizing oil.
[0010] As a simplified solution of this technical solution, the plastic oil is located on the slots of the second track of the ball nut; the slots are located on both sides of the second track and fit tightly with the ball during movement;
[0011] As another embodiment of this technical solution, the ball is coated with plastic oil and rotates with the rolling element. The self-lubricating properties of the plastic oil material are utilized to reduce friction, improve load-bearing capacity, and avoid the problem of lubricating oil and grease leakage.
[0012] The plastic oil described in the above technical solution is a high-molecular polymer material with special lubricating properties. It adsorbs saturated lubricating oil inside. During operation, the lubricating oil moves to the surface of the friction pair under the action of capillary action to form a lubricating oil film. When the operation stops, the lubricating oil will be re-adsorbed into the polymer and stored.
[0013] More preferably, the plasticizer oil is composed of a polymer such as polyethylene (PE), ultra-high molecular weight polyethylene (UHMWPE), polyimide, or PEEK as a base material, mixed with lubricating oil and additives to form a viscous fluid lubricating medium. This lubricant is injected into the bearing via injection molding, compression molding, vulcanization, or other methods, and then heated and solidified to form a porous, oil-containing lubricating material. These micropores can accommodate the lubricating oil, which is retained within the material by surface tension. The lubricant provides excellent lubrication for the bearing and effectively seals the bearing cavity by completely filling it.
[0014] The utility model has the following beneficial effects:
[0015] Environmental protection and safety: The solid form is not easy to leak, reducing the risk of environmental pollution.
[0016] Low friction and wear: Plastic oil can form a lubricating film on its own, reducing friction and wear between moving parts.
[0017] Maintenance-free: The screw is maintenance-free, reducing the user's use and maintenance costs.
[0018] The utility model utilizes the efficient lubricating characteristics of plastic oil, significantly improves the stability and durability of the screw operation, reduces equipment failures caused by poor lubrication, thereby improving production efficiency and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural diagram of the ball screw lubrication method mentioned in the utility model;
[0020] Figure 2 This is a structural diagram of the trapezoidal screw lubrication method mentioned in the present invention.
[0021] Figure 3 This is a structural diagram of the planetary roller screw lubrication method mentioned in the present invention. DETAILED DESCRIPTION
[0022] The present invention will be further described below in conjunction with the accompanying drawings and relevant knowledge, and described clearly and completely. Obviously, the applications described are only part of the embodiments of the present invention, rather than all of the embodiments.
[0023] The present invention will be described in further detail below with reference to the accompanying drawings.
[0024] In order to solve the problem that the traditional screw system requires frequent lubrication and maintenance during use, the utility model proposes a new maintenance-free screw, and specifically provides the following embodiments; Example 1
[0025] A new type of maintenance-free screw comprises: a ball screw 1, a ball nut 2, balls 3 and a return device 4 that cooperate with each other; a first track 5 is provided in the ball screw 1, a second track 6 is provided on the ball nut, and a third track 7 is provided on the return device; plastic oil 8 is provided on the first track, the second track and the third track. In the present utility model, the lubricating oil is not supplied to the screw, but directly to the balls. After the balls in the nut come into contact with the plastic oil block and the return device during movement, the lubricating oil will be added to the surface of the balls and then transported to the load area through the ball circulation. Therefore, the load area can always ensure the optimal amount of oil, maintain the lubrication performance for a long time, and ensure that there will be no leakage caused by excessive grease.
[0026] In this example, the material of the return device is metal, non-metal or embedded plastic oil; as a further improvement, the material of the return device 4 can be entirely composed of plastic oil. By changing the material of the return device 4 to plastic oil, the oil storage capacity of the slider can be increased, and the ball 3 can be lubricated for a longer period of time during the rolling process. Example 2
[0027] A novel maintenance-free lead screw comprises: a ball screw 1, a ball nut 2, balls 3, and a return mechanism 4, all of which cooperate with each other. The ball screw 1 is provided with a first track 5, the ball nut is provided with a second track 6, and the return mechanism is provided with a third track 7. Plastic oil 8 is provided on the first, second, and third tracks. The first, second, and third tracks are provided with inlay structures for embedding the plastic oil. The plastic oil is tightly bonded to the first, second, and third tracks through the inlay structures. By embedding the plastic oil into the tracks, lubrication is achieved during the rolling process. Thus, maintenance-free running performance can be maintained solely by the lubricant in the plastic oil. The lubricant in the plastic oil only provides the amount necessary to maintain lubrication of the rolling guide portion. Even during long-term operation, lubricant consumption is minimal. Therefore, long-term lubrication performance is maintained. Unlike lubrication methods that are installed on the outside of the slider and in contact with the rail, this lubricant does not generate sliding resistance. It can sensitively follow the driving force, helping to improve mechanical precision and energy efficiency (minimize friction loss). It should be noted that other parts assembled with the screw guide rails that are embedded with plastic body oil to achieve maintenance-free performance also fall within the scope of protection of this application. In order to avoid frequent grease filling during the use of the ball screw and to prevent grease leakage during use, a solid lubricant is made of polymer material and embedded inside the ball nut. The lubricating oil stored inside the solid lubricant lubricates the track and the balls in the ball nut, which can achieve grease-free use of the ball screw and avoid grease leakage.
[0028] It should be noted that there is no limitation on the inlay method mentioned in this application. For example, it can be inlaid through a groove structure, or through other methods, such as a point-distributed recessed structure. Example 3
[0029] A novel maintenance-free lead screw comprises: a ball screw 1, a ball nut 2, balls 3, and a return mechanism 4, which cooperate with each other. A first track 5 is provided within the ball screw 1, a second track 6 is provided on the ball nut, and a third track 7 is provided on the return mechanism. Plastic oil 8 is provided on the first, second, and third tracks. The plastic oil is located in the slots of the second track of the ball nut, and is provided on both sides of the second track, tightly fitting the balls during movement. As a further improvement to this technical solution, the balls are coated with plastic oil and rotate with the rolling elements. The self-lubricating properties of the plastic oil material are utilized to reduce friction, improve load-bearing capacity, and avoid the problem of lubricating oil and grease leakage.
[0030] In this example, the plastic oil is internally adsorbed with saturated lubricating oil. During operation, the lubricating oil moves to the friction pair surface under the action of capillary action, forming a lubricating oil film. When the operation stops, the lubricating oil is reabsorbed into the polymer and stored. The plastic oil is composed of a polymer such as polyethylene (PE), ultra-high molecular weight polyethylene, polyimide, or PEEK as a base material, and is mixed with lubricating oil and additives to form a viscous fluid lubricating medium. After being injected into the bearing through injection molding, molding, vulcanization, etc., it is heated and solidified to form a porous oil-containing lubricating material. These micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and acts as an extremely effective seal by completely filling the bearing cavity. Example 4
[0031] A novel maintenance-free screw comprises: a screw rod and a nut which cooperate with each other; a first track is provided in the screw rod, a second track is provided on the nut, plastic oil is provided on the first track and the second track, wherein the screw rod is a trapezoidal screw rod 10, and the nut is a trapezoidal nut 9; preferably, referring to Figure 2 As shown, the plastic oil 8 is arranged between the trapezoidal screw 10 and the trapezoidal nut 9, and the self-lubricating properties of the plastic oil material are utilized to reduce friction, improve the load-bearing capacity, and avoid the problem of leakage of lubricating oil and grease. This embodiment is a trapezoidal screw, which can achieve lubrication of the trapezoidal screw. Example 5
[0032] A new type of maintenance-free screw, comprising: a screw rod and a nut that cooperate with each other; a first track is provided in the screw rod, a second track is provided on the nut, the nut is an inner roller nut 11, the roller nut is provided with a plurality of rollers 12, plastic oil is provided between the rollers, the screw rod is a planetary roller screw 13, and further includes an inner gear ring 14, a retaining ring 15, further reference Figure 3 As shown, plastic oil columns 8 are provided between the rollers, which utilize the self-lubricating properties of the plastic oil material to reduce friction, improve the load-bearing capacity, and avoid the problem of leakage of lubricating oil and grease. This embodiment is a roller screw, which can achieve lubrication of the roller screw.
[0033] Compared with the prior art, the present invention has the following beneficial effects:
[0034] Environmental protection and safety: The solid form is not easy to leak, reducing the risk of environmental pollution.
[0035] Low friction and wear: Plastic oil can form a lubricating film on its own, reducing friction and wear between moving parts.
[0036] Maintenance-free: The screw is maintenance-free, reducing the user's use and maintenance costs.
[0037] This new invention utilizes the highly efficient lubricating properties of plastic oil to significantly improve the stability and durability of the screw's operation, reducing equipment failures caused by poor lubrication, thereby improving production efficiency and reducing maintenance costs. By using a solid lubricant made of polymer material and embedding it inside the nut, the lubricating oil stored in the solid lubricant lubricates the track, eliminating the need for grease refilling during the screw's use and preventing grease leakage.
[0038] Although some embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and all of these changes, modifications, substitutions and variations should fall within the scope of the present invention.
Claims
1. A new type of maintenance-free screw, characterized in that: include: Match the screw rod and nut with each other; A first track is provided in the screw rod, and a second track is provided on the nut. The first track or the second track is in contact with the plastic oil.
2. A new maintenance-free screw according to claim 1, characterized in that: It also includes a ball and a return device, the screw rod is a ball screw, the nut is a ball nut, the ball screw, ball nut, ball and return device cooperate with each other; the return device is provided with a third track, at least one of the first track, second track and third track contacts the plastic oil, and the material of the return device is metal, non-metal or embedded with plastic oil.
3. A new maintenance-free screw according to claim 1, characterized in that: The lead screw is a trapezoidal lead screw, and the nut is a trapezoidal nut.
4. A new maintenance-free screw according to claim 1, characterized in that: The nut is an inner roller nut, the roller nut is provided with a plurality of rollers, plastic oil is provided between the rollers, and the screw rod is a planetary roller screw.
5. A new maintenance-free screw according to claim 2, characterized in that: The body-plasticizing oil is tightly fitted with at least one of the first track, the second track and the third track through an embedding structure. The first track, the second track and the third track are provided with an embedding structure for embedding the body-plasticizing oil.
6. A new maintenance-free screw according to claim 5, characterized in that: The plastic oil is located on the slot of the second track of the ball nut.
7. A new maintenance-free screw according to claim 6, characterized in that: The second track is provided with grooves on both sides, and plastic oil is provided in the grooves, which fit closely with the balls during movement.
8. A new maintenance-free screw according to claim 7, characterized in that: The balls are coated with plastic oil and rotate with the rolling element, utilizing the self-lubricating properties of the plastic oil material to reduce friction, improve load-bearing capacity, and avoid the problem of lubricating oil and grease leakage.
9. According to the new maintenance-free screw described in claim 1, the plastic oil is a high-molecular polymer material with special lubricating properties, and saturated lubricating oil is adsorbed inside. During operation, the lubricating oil moves to the surface of the friction pair under the action of capillary action to form a lubricating oil film. When the operation stops, the lubricating oil will be re-adsorbed into the polymer and stored.
10. A novel maintenance-free lead screw according to claim 9, wherein the plastic oil is made of polyethylene PE, ultra-high molecular weight polyethylene, polyimide or PEEK polymer as a base material, and is mixed with lubricating oil and additives to form a viscous fluid lubricating medium. After being injected into the bearing through injection molding, molding, vulcanization, etc., it is heated and solidified to form a porous oil-containing lubricating material. These micropores can accommodate the lubricating oil and retain it in the material through surface tension. The lubricant provides excellent lubrication for the bearing and plays an extremely effective sealing role by completely filling the bearing cavity.