Metal screw assembly with self-lubricating function

Abstract

The utility model relates to the technical field of screws, and discloses a metal screw assembly with a self-lubricating function, which comprises a screw, the outer wall of the screw is in threaded connection with a first nut, the left side of the first nut is fixedly connected with an oil storage tank, the inner wall of the oil storage tank is rotatably connected with a ball, the outer wall of the ball is provided with a plurality of pits, and the pits are in threaded connection with the first nut. An oil groove is formed in the outer wall of the screw rod, the outer wall of the ball is in sliding connection with the inner wall of the oil groove, a plurality of capillary holes are formed in the outer wall of the screw rod, an oil filling port is formed in the top of the oil storage tank, a plurality of mounting holes are formed in the outer wall of the mounting block, and a plug is rotationally connected to the inner wall of the oil filling port. According to the utility model, lubricating oil is brought into the oil groove through the pits on the surfaces of the balls, and the lubricating oil in the oil groove further permeates into the threaded contact surface of the screw rod and the first nut through the capillary holes, so that comprehensive and effective lubrication is realized, frictional wear is reduced, and the service life of the assembly is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw technology field especially relates to metal screw assembly with self -lubricating function. BACKGROUND

[0002] Screw assembly is a kind of mechanical device by screw and related supporting components, screw is the cylinder with helical groove cut on outer surface, supporting components commonly have nut, end support component, nut has internal thread matched with screw outer thread, end support component includes bearing seat and bearing, for ensuring screw stable rotation and bearing axial and radial force, screw assembly is widely used in machine tool, automation equipment, building, machine tool is used for accurate control cutter and worktable position, automation equipment is used for industrial robot joint drive, also plays an important role in hoisting equipment of building construction.

[0003] Screw and nut will produce relative motion between them in the working process of screw, if without lubrication, the friction coefficient between them will be relatively large, and the heat generated by friction will cause the surface temperature of screw and nut to rise, cause the thermal expansion of material, thereby affect the precision of screw assembly, high friction also exacerbates wear, makes the thread surface of screw and nut appear wear and scratch, the screw lubrication of present is artificial addition of lubricant, also have the use solid lubricant, but artificial addition of lubricant increases the labor cost, also very difficult to make lubricant evenly cover the entire screw surface, the heat conduction performance of solid lubricant is not as good as liquid lubricant, in the equipment running process, the heat generated by friction is difficult to quickly dissipate through solid lubricant, easily lead to the temperature rise of friction component, cause the wear and aging of material, reduce the service life of equipment. CONTENT OF UTILITY MODEL

[0004] In order to make up for the above insufficient, the utility model provides metal screw assembly with self -lubricating function, aims at improving the problem that artificial addition of lubricant increases the labor cost in prior art, also very difficult to make lubricant evenly cover the entire screw surface, the heat conduction performance of solid lubricant is not as good as liquid lubricant, in the equipment running process, the heat generated by friction is difficult to quickly dissipate through solid lubricant, easily lead to the temperature rise of friction component, cause the wear and aging of material, reduce the service life of equipment.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: metal screw rod assembly with self -lubricating function, including screw rod, the outer wall screw thread connection of screw rod has first nut, the left side fixed connection of first nut has oil storage tank, the inner wall rotation of oil storage tank is connected with the ball, a plurality of pits are established to the outer wall of ball, the outer wall of screw rod is equipped with oil groove, the outer wall of ball and the inner wall of oil groove are connected slidingly, a plurality of capillary holes are established to the outer wall of screw rod, the top of oil storage tank is equipped with oil filler, the right side of first nut is provided with pre -tightening mechanism, and the pre -tightening mechanism is used for improving precision.

[0006] As a further description of the above technical scheme:

[0007] The pre-tightening mechanism includes a side plate, the left side outer wall of the side plate is fixedly connected with the right side of the first nut, a groove is formed in the right side outer wall of the side plate, a protruding block is slidably connected to the inner wall of the groove, a second sliding block is fixedly connected to the outer wall of the protruding block, a first sliding block is slidably connected to the outer wall of the second sliding block, and a screw is rotatably connected to one end of the first sliding block.

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

[0009] The right side outer wall of the side plate is fixedly connected with a second nut, and the right side outer wall of the second nut is fixedly connected with a mounting block.

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

[0011] A plurality of mounting holes are formed in the outer wall of the mounting block, and a plug is rotatably connected to the inner wall of the oil filler.

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

[0013] Bearing is fixedly connected to both ends of the screw rod, the outer wall of the bearing is fixedly connected with a support part, and a plurality of fastening holes are formed in the outer wall of the support part.

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

[0015] The left side outer wall of the first sliding block is slidably connected with the inner wall of the groove, and the top of the screw is fixedly connected with a cross cap.

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

[0017] The outer wall of the side plate is provided with a threaded hole, and the screw is threadedly connected with the threaded hole.

[0018] As a further description of the above technical scheme:

[0019] The outer wall of the first sliding block is fixedly connected with a dovetail block, and the outer wall of the second sliding block is provided with a dovetail groove.

[0020] The utility model has the advantages of the following:

[0021] 1、 the utility model discloses, when screw rod rotates, first nut moves on screw rod, and the outer wall of screw rod is opposite with the inner wall of first nut and rotates, and the lubricating oil is stored in the oil tank, when screw rod rotates, the outer wall of the ball of oil tank inner wall is connected with the outer wall of oil groove and slides, and drives the rotation of the ball, and the dimple on the ball carries the lubricating oil in the oil tank and flows into the oil groove, and the capillary hole on the screw rod transports the lubricating oil in the oil groove to the overall outer wall of screw rod, realizes the automatic lubrication of screw rod.

[0022] 2、 the utility model discloses, adjust the interval of first nut and second nut, can effectively improve the operation precision of assembly, when rotating screw, first sliding block is extruded downwards, because second sliding block is fixed with the extension block, and the contact surface of second sliding block and second sliding block is inclined, then the extension block is extruded to the outside, realize the interval between first nut and capillary hole, make the axial force between screw rod and first nut, improve the rigidity and transmission precision of assembly. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the front side perspective drawing of the metal screw rod assembly with self-lubricating function provided by the utility model;

[0024] Figure 2 It is the partial structure drawing of the oil tank of the metal screw rod assembly with self-lubricating function provided by the utility model;

[0025] Figure 3 It is Figure 2 The enlarged view of A in the middle;

[0026] Figure 4 It is the partial structure display drawing of the ball of the metal screw rod assembly with self-lubricating function provided by the utility model;

[0027] Figure 5 It is the partial structure display drawing of the dimple of the metal screw rod assembly with self-lubricating function provided by the utility model;

[0028] Figure 6 It is the partial structure split drawing of the side plate of the metal screw rod assembly with self-lubricating function provided by the utility model.

[0029] LEGEND:

[0030] 1, screw; 2, pre-tightening mechanism; 201, side plate; 202, groove; 203, first sliding block; 204, second sliding block; 205, protruding block; 206, screw; 3, first nut; 4, oil tank; 5, oil groove; 6, capillary hole; 7, ball; 8, pit; 9, oil filler; 10, plug; 11, bearing; 12, supporting part; 13, fastening hole; 14, mounting block; 15, mounting hole; 16, second nut; 17, threaded hole; 18, cross cap; 19, dovetail block; 20, dovetail groove. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] Please refer to the drawings Figure 1 - the drawings Figure 3 An embodiment provided by the utility model: the metal screw assembly with self-lubricating function, including screw 1, the outer wall of screw 1 is connected with first nut 3 by thread, so that first nut 3 can carry out accurate linear movement on screw 1, thereby realizing force transmission and motion conversion, the left side of first nut 3 is fixedly connected with oil tank 4, the inner wall of oil tank 4 is rotatably connected with ball 7, the outer wall of ball 7 is provided with a plurality of pits 8, the function of pit 8 is to store a certain amount of lubricating oil, so as to take out lubricating oil in the process of ball 7 rotation, the outer wall of screw 1 is provided with oil groove 5, the outer wall of ball 7 is slidably connected with the inner wall of oil groove 5, the outer wall of screw 1 is provided with a plurality of capillary holes 6, when ball 7 rotates, the lubricating oil in pit 8 will flow into oil groove 5, at the same time, the outer wall of screw 1 is also provided with a plurality of capillary holes 6, capillary hole 6 further penetrates the lubricating oil in oil groove 5 to the thread contact surface of screw 1 and first nut 3 by capillary phenomenon, so as to realize comprehensive and effective lubrication, reduce friction and wear, prolong the service life of the assembly, the top of oil tank 4 is provided with oil filler 9, the right side of first nut 3 is provided with pre-tightening mechanism 2, pre-tightening mechanism 2 is used to improve precision.

[0033] Please refer to the drawings Figure 5 - the drawings Figure 6The pre-tightening mechanism 2 comprises a side plate 201, the left outer wall of the side plate 201 is fixedly connected with the right side of the first nut 3, a groove 202 is arranged on the right outer wall of the side plate 201, a protruding block 205 is slidably connected with the inner wall of the groove 202, the inner wall of the groove 202 and the outer wall of the protruding block 205 form a sliding connection relationship, the protruding block 205 can freely linearly slide in the groove 202, the outer wall of the protruding block 205 is fixedly connected with a second sliding block 204, the outer wall of the second sliding block 204 is slidably connected with a first sliding block 203, one end of the first sliding block 203 is rotatably connected with a screw 206, by rotating the screw 206, the first sliding block 203 can be pushed to move along a specific direction, since the first sliding block 203 is slidably connected with the second sliding block 204, the protruding block 205 is further driven to slide in the groove 202, so as to change the overall structural size of the pre-tightening mechanism 2.

[0034] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 3 The right outer wall of the side plate 201 is fixedly connected with the second nut 16, the right outer wall of the second nut 16 is fixedly connected with the mounting block 14, the mounting holes 15 are used for mounting other mechanical structures to the assembly, a plurality of mounting holes 15 are arranged on the outer wall of the mounting block 14, the inner wall of the oil filler hole 9 is rotatably connected with the plug 10, the both ends of the screw rod 1 are fixedly connected with the bearings 11, the outer wall of the bearings 11 is fixedly connected with the support components 12, a plurality of fastening holes 13 are arranged on the outer wall of the support components 12, the bearings 11 can reduce the frictional resistance of the screw rod 1 in the rotating process, so that the rotation is more smooth, a plurality of fastening holes 13 are arranged on the outer wall of the support components 12, the support components 12 and the whole assembly can be firmly mounted on the corresponding equipment base through the fastening holes 13, so as to provide a stable support environment for the assembly.

[0035] Please refer to the accompanying drawings Figure 4 - the accompanying drawings Figure 6 The left outer wall of the first sliding block 203 is slidably connected with the inner wall of the groove 202, the top of the screw 206 is fixedly connected with the cross cap 18, so as to facilitate the rotation operation of the screw 206 by using a tool, a threaded hole 17 is arranged on the outer wall of the side plate 201, the screw 206 is threadedly connected with the threaded hole 17, so as to ensure the position stability and force transmission efficiency of the screw 206 in the rotating process, the outer wall of the first sliding block 203 is fixedly connected with the dovetail block 19, the outer wall of the second sliding block 204 is provided with the dovetail groove 20, so that the sliding connection between the first sliding block 203 and the second sliding block 204 is more firm and reliable, and the loosening and deviation phenomena in the pre-tightening force adjustment process are reduced.

[0036] Working principle: when the screw 1 rotates, the first nut 3 moves on the screw 1, the outer wall of the screw 1 rotates relative to the inner wall of the first nut 3, the oil tank 4 stores lubricating oil, when the screw 1 rotates, the outer wall of the ball 7 in the oil tank 4 is in sliding connection with the outer wall of the oil groove 5, the ball 7 is driven to rotate, the recess 8 on the ball 7 brings the lubricating oil in the oil tank 4 out of the oil tank 4 and into the oil groove 5, the capillary hole 6 on the screw 1 delivers the lubricating oil in the oil groove 5 to the outer wall of the screw 1, realizing automatic lubrication of the screw 1.

[0037] Adjusting the interval between the first nut 3 and the second nut 16 can effectively improve the operation accuracy of the assembly, when the screw 206 is rotated, the first sliding block 203 is pressed downward, since the second sliding block 204 is fixed with the protruding block 205, and the contact surface of the second sliding block 204 and the second sliding block 204 is a slope, the protruding block 205 is pressed outward, the interval between the first nut 3 and the capillary hole 6 is adjusted, a certain axial force is generated between the screw 1 and the first nut 3, and the rigidity and transmission accuracy of the assembly are improved.

[0038] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principles of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A metal screw assembly with self-lubricating function, comprising a screw rod (1), characterized in that: The outer wall of the screw rod (1) is threadedly connected with a first nut (3), the left side of the first nut (3) is fixedly connected with an oil storage tank (4), the inner wall of the oil storage tank (4) is rotatably connected with a ball (7), a plurality of pits (8) are formed in the outer wall of the ball (7), an oil groove (5) is formed in the outer wall of the screw rod (1), the outer wall of the ball (7) is slidably connected with the inner wall of the oil groove (5), a plurality of capillary holes (6) are formed in the outer wall of the screw rod (1), an oil filling port (9) is formed in the top of the oil storage tank (4), and the right side of the first nut (3) is provided with a pre-tightening mechanism (2), which is used for improving the accuracy.

2. The metal screw assembly with self-lubricating function according to claim 1, characterized in that: The pre-tightening mechanism (2) comprises a side plate (201), the left side of the side plate (201) is fixedly connected with the right side of the first nut (3), a groove (202) is formed in the right side of the side plate (201), the inner wall of the groove (202) is slidably connected with a protruding block (205), the outer wall of the protruding block (205) is fixedly connected with a second sliding block (204), the outer wall of the second sliding block (204) is slidably connected with a first sliding block (203), and one end of the first sliding block (203) is rotatably connected with a screw (206).

3. The metal screw assembly with self-lubricating function according to claim 2, characterized in that: The right side of the side plate (201) is fixedly connected with a second nut (16), and the right side of the second nut (16) is fixedly connected with a mounting block (14).

4. The metal screw assembly with self-lubricating function according to claim 3, characterized in that: A plurality of mounting holes (15) are formed in the outer wall of the mounting block (14), and the inner wall of the oil filling port (9) is rotatably connected with a plug (10).

5. The metal screw assembly with self-lubricating function according to claim 1, characterized in that: Bearing (11) is fixedly connected to both ends of the screw rod (1), and the outer wall of the bearing (11) is fixedly connected with a support part (12), and the outer wall of the support part (12) is provided with a plurality of fastening holes (13).

6. The metal screw assembly with self-lubricating function according to claim 2, characterized in that: The left side of the first sliding block (203) is slidably connected with the inner wall of the groove (202), and the top of the screw (206) is fixedly connected with a cross cap (18).

7. The metal screw assembly with self-lubricating function according to claim 2, characterized in that: The outer wall of the side plate (201) is provided with a threaded hole (17), and the screw (206) is threadedly connected with the threaded hole (17).

8. The metal screw assembly with self-lubricating function according to claim 2, characterized in that: The outer wall of the first sliding block (203) is fixedly connected with a dovetail block (19), and the outer wall of the second sliding block (204) is provided with a dovetail groove (20).

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