Wear-resistant high-precision ball screw pair

Abstract

The utility model relates to the technical field of ball screw pairs, and discloses a wear-resistant high-precision ball screw pair which comprises a ball screw and a ball nut, an oil groove is formed in the inner wall of the ball nut, a communicating groove is formed in the inner wall of the ball nut, an oil pipe is fixedly installed on the inner wall of the ball nut, and the oil pipe is communicated with the communicating groove. The wear-resistant high-precision ball screw pair comprises a ball nut, an oil groove is formed in the ball nut, one end of the oil pipe extends to the inner wall of the oil groove, the other end of the oil pipe is in threaded connection with a pipe cover, a lubricating mechanism is arranged in the ball nut, and an auxiliary mechanism is arranged on the lubricating mechanism. And when the balls do not need to be lubricated, lubricating oil can be sealed in the communicating groove and the oil groove, the use value of the lubricating oil is fully exerted, and waste of the lubricating oil is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screw pairs, in particular to a wear-resistant and high-precision ball screw pair. Background Art

[0002] Ball screw pair is also called ball screw pair or ball screw pair. It is composed of a screw and a ball nut. It is the most accurate and commonly used transmission device in transmission machinery.

[0003] According to a disclosed high-hardness and wear-resistant ball screw pair (publication number: CN220890971U), in the above application, when the sealing ring moves downward, the softened oil inside the oil groove enters the interior of the circulation groove through the connecting pipe, and then the softened oil is sprayed on the surface of the steel ball and the ball screw body through the spray hole, thereby reducing the friction between the two, thereby making the device more wear-resistant, and the oil groove corresponds to the circulation groove.

[0004] Although the device can lubricate the steel balls and the ball screw body, the spray hole for discharging the softened oil lacks a sealing device. Since the oil tank, connecting pipe, flow groove and spray hole of the device are all connected, during the operation of the ball screw body, the softened oil in the oil tank will flow into the flow groove along the connecting pipe, and then flow out through the spray hole, resulting in a waste of softened oil when lubrication is not needed, which is not conducive to saving softened oil. Utility Model Content

[0005] The utility model aims to provide a wear-resistant and high-precision ball screw pair to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wear-resistant high-precision ball screw pair, comprising a ball screw and a ball nut, the inner wall of the ball nut is provided with an oil groove, the inner wall of the ball nut is provided with a connecting groove, the ball nut is provided with a through hole, the inner wall of the ball nut is fixedly installed with an oil pipe, one end of the oil pipe extends to the inner wall of the oil groove, the other end of the oil pipe is threadedly connected with a pipe cover, a lubrication mechanism is arranged inside the ball nut, by arranging the lubrication mechanism, the lubrication oil can be discharged when the ball needs to be lubricated, and when the steel ball does not need to be lubricated, the lubrication oil outflow and the waste of lubrication oil can be avoided, the lubrication mechanism is provided with an auxiliary mechanism, by arranging the auxiliary mechanism, it is convenient for the staff to judge the residual lubrication oil in the oil groove, and the lubrication mechanism comprises:

[0007] A push rod, the outer wall of the push rod is attached to the inner wall of the ball nut, one end of the push rod extends to the inside of the oil groove and is fixedly installed with a piston, the other end of the push rod is fixedly installed with a knob, the outer wall of the push rod is sleeved with a spring, one end of the spring is fixedly installed on the outer wall of the knob, and the other end of the spring is attached to the outer wall of the ball nut. By setting the knob, the push rod can be not only pushed and pulled, but also rotated;

[0008] An extrusion rod, the extrusion rod is slidably connected to the inner wall of the piston, and the extrusion rod passes through the piston. The sealing plate can be squeezed by arranging the extrusion rod;

[0009] A sealing plate is slidably connected to the inner wall of the connecting groove, a through opening is opened on the sealing plate, a spring is fixedly installed on one end of the sealing plate, the other end of the sealing plate is attached to the outer wall of the extrusion rod, and the end of the spring away from the sealing plate is fixedly installed on the inner wall of the connecting groove. By setting the spring, the sealing plate can be driven to slide and reset, and the through hole can be blocked by setting the sealing plate.

[0010] Preferably, the auxiliary mechanism comprises a sliding rod, and the sliding rod is slidably connected to the inner wall of the push rod.

[0011] Preferably, one end of the slide rod passes through the piston and is fixedly installed with a floating plate, and the other end of the slide rod passes through the knob and is fixedly installed with a limit block. The full name of the floating plate is polystyrene foam board, also known as EPS board. The main component is polystyrene resin, which has the characteristics of light weight, low thermal conductivity and low water absorption. By setting the floating plate, the slide rod can be driven to move synchronously with the liquid level inside the oil tank.

[0012] Preferably, the slide rod is slidably connected to the penetration point of the piston, and the slide rod is slidably connected to the penetration point of the knob.

[0013] Preferably, the communicating groove is communicated with the oil groove, and the communicating groove is communicated with the through hole.

[0014] Preferably, both ends of the extrusion rod are in contact with the inner wall of the oil tank.

[0015] Compared with the prior art, the utility model provides a wear-resistant and high-precision ball screw pair, which has the following beneficial effects:

[0016] 1. The wear-resistant high-precision ball screw pair is provided with a lubrication mechanism. When the ball needs to be lubricated, lubricating oil can be discharged to the surface of the ball to avoid excessive wear of the ball and increase the service life of the ball. When the ball does not need to be lubricated, the lubricating oil can be sealed inside the connecting groove and the oil groove, so as to give full play to the use value of the lubricating oil and avoid waste of the lubricating oil.

[0017] 2. The wear-resistant high-precision ball screw pair can facilitate the staff to judge the remaining lubricating oil in the oil tank by setting the floating plate, sliding rod and limit block, so that the staff can add lubricating oil in time according to the usage for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the push rod of the utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the sealing plate of the utility model;

[0022] Figure 5 For this utility model Figure 2 A is an enlarged structural diagram of FIG.

[0023] In the figure: 1. ball screw; 2. ball nut; 3. oil groove; 4. connecting groove; 5. through hole; 6. oil pipe; 7. pipe cover; 8. lubrication mechanism; 81. push rod; 82. extrusion rod; 83. sealing plate; 84. piston; 85. knob; 86. spring; 87. through port; 88. reed; 9. auxiliary mechanism; 91. slide rod; 92. floating plate; 93. limit block. DETAILED DESCRIPTION

[0024] like Figure 1-Figure 5As shown, the utility model provides a technical solution: a wear-resistant high-precision ball screw pair, including a ball screw 1 and a ball nut 2, an oil groove 3 is provided on the inner wall of the ball nut 2, a connecting groove 4 is provided on the inner wall of the ball nut 2, the connecting groove 4 is connected with the oil groove 3, a through hole 5 is provided on the ball nut 2, the connecting groove 4 is connected with the through hole 5, the lubricating oil in the oil groove 3 can be pressed into the inside of the connecting groove 4 by a piston 84, so that the lubricating oil in the connecting groove 4 can be discharged to the outer wall of the ball through the through hole 5, so that the ball can be lubricated, and an oil pipe 6 is fixedly installed on the inner wall of the ball nut 2, and one end of the oil pipe 6 extends to the oil The inner wall of the groove 3 and the other end of the oil pipe 6 are threadedly connected with a pipe cover 7. The pipe cover 7 is rotated to separate it from the oil pipe 6. At this time, lubricating oil can be injected into the interior of the oil groove 3 through the oil pipe 6. A lubricating mechanism 8 is arranged inside the ball nut 2. By setting the lubricating mechanism 8, the lubricating oil can be discharged when the ball needs to be lubricated. When the steel ball does not need to be lubricated, the lubricating oil can be prevented from flowing out and causing waste of lubricating oil. An auxiliary mechanism 9 is arranged on the lubricating mechanism 8. By setting the auxiliary mechanism 9, it is convenient for the staff to judge the remaining lubricating oil in the oil groove 3, so that the staff can add lubricating oil in time according to the usage for subsequent use.

[0025] The lubrication mechanism 8 comprises a push rod 81, an extrusion rod 82, a sealing plate 83, a piston 84, a knob 85, a spring 86, a through port 87, and a spring leaf 88; the outer wall of the push rod 81 is fitted to the inner wall of the ball nut 2, one end of the push rod 81 extends to the inside of the oil groove 3 and is fixedly mounted with a piston 84, and the other end of the push rod 81 is fixedly mounted with a knob 85, and the push rod 81 is pressed by the knob 85 and the spring 86 is compressed, so that the push rod 81 squeezes the piston 84, and at this time, the piston 84 can be used to press the lubricating oil in the oil groove 3 into the inside of the connecting groove 4, so that the connecting groove The lubricating oil inside the ball bearing can be discharged to the outer wall of the ball bearing through the through hole 5. The outer wall of the push rod 81 is sleeved with a spring 86. One end of the spring 86 is fixedly mounted on the outer wall of the knob 85. The other end of the spring 86 is attached to the outer wall of the ball bearing nut 2. The knob 85 can be pushed by the elasticity of the spring 86, so that the knob 85 drives the push rod 81 to slide out of the ball bearing nut 2, so that the push rod 81 drives the piston 84 to move and reset. The extrusion rod 82 is slidably connected to the inner wall of the piston 84, and the extrusion rod 82 passes through the piston 84. Both ends of the extrusion rod 82 are attached to the oil The inner wall of the groove 3 is rotated by turning the push rod 81 through the knob 85, so that the push rod 81 drives the piston 84 to rotate. When the piston 84 rotates, it drives the extrusion rod 82 to move against the inner wall of the oil groove 3 and squeeze the sealing plate 83. The sealing plate 83 is slidably connected to the inner wall of the connecting groove 4. A through hole 87 is opened on the sealing plate 83. The sliding of the sealing plate 83 can drive the through hole 87 to gradually approach the through hole 5. When the through hole 87 and the through hole 5 are in a connected state, the lubricating oil inside the oil groove 3 and the connecting groove 4 can flow out through the through hole 5. A spring is fixedly installed at one end of the sealing plate 83. The other end of the sealing plate 83 is attached to the outer wall of the extrusion rod 82. When the extrusion rod 82 squeezes the sealing plate 83, the sealing plate 83 will slide on the inner wall of the connecting groove 4 toward the end away from the oil groove 3 and compress the spring plate 88. The end of the spring plate 88 away from the sealing plate 83 is fixedly installed on the inner wall of the connecting groove 4. The elasticity of the spring plate 88 can drive the sealing plate 83 to slide and reset. The sliding of the sealing plate 83 can drive the opening 87 to be staggered with the through hole 5. At this time, the through hole 5 can be blocked by the sealing plate 83 to avoid the waste of lubricating oil inside the connecting groove 4 from flowing out.

[0026] The above-mentioned auxiliary mechanism 9 includes a slide bar 91, a floating plate 92, and a limit block 93; the slide bar 91 is slidably connected to the inner wall of the push rod 81, one end of the slide bar 91 passes through the piston 84 and is fixedly installed with a floating plate 92, and the other end of the slide bar 91 passes through the knob 85 and is fixedly installed with a limit block 93. When the liquid level inside the oil tank 3 gradually decreases, the floating plate 92 can be used to drive the slide bar 91 to drop synchronously with the liquid level, and the limit block 93 can be gradually approached to the knob 85. The slide bar 91 is slidably connected to the penetration point of the piston 84, and the slide bar 91 is slidably connected to the penetration point of the knob 85. By observing the distance between the limit block 93 and the knob 85, the remaining lubricating oil in the oil tank 3 at this time can be judged, so that the staff can add lubricating oil in time according to the usage.

[0027] Working principle: when it is necessary to lubricate the ball between the ball nut 2 and the ball screw 1, firstly, the push rod 81 is rotated by the knob 85, so that the push rod 81 drives the piston 84 to rotate. When the piston 84 rotates, it drives the extrusion rod 82 to move against the inner wall of the oil groove 3 and squeeze the sealing plate 83, so that the sealing plate 83 slides on the inner wall of the connecting groove 4 toward the end away from the oil groove 3 and compresses the spring 88. At this time, the sliding of the sealing plate 83 can drive the through port 87 to gradually approach the through hole 5. When the through port 87 and the through hole 5 are in a connected state, the lubricating oil inside the oil groove 3 and the connecting groove 4 can flow out through the through hole 5. At this time, the push rod 81 is pressed by the knob 85 and the spring 86 is compressed, so that the push rod 81 squeezes the piston 84. At this time, the lubricating oil inside the oil groove 3 can be pressed into the connecting groove 4 by the piston 84. The inside of the groove 4 allows the lubricating oil inside the connecting groove 4 to be discharged to the outer wall of the ball through the through hole 5, thereby lubricating the ball. When the lubrication is completed, the knob 85 is loosened. At this time, the elasticity of the spring 86 can push the knob 85, so that the knob 85 drives the push rod 81 to slide out of the ball nut 2, so that the push rod 81 drives the piston 84 to move and reset. At the same time, the extrusion rod 82 will be separated from the extrusion of the sealing plate 83. At this time, the elasticity of the spring leaf 88 can drive the sealing plate 83 to slide and reset. The sliding of the sealing plate 83 can drive the through hole 87 to be staggered with the through hole 5. At this time, the sealing plate 83 can be used to block the through hole 5, so that the lubricating oil inside the connecting groove 4 cannot flow out through the through hole 5. When the ball does not need to be lubricated, the waste of lubricating oil can be avoided.

[0028] When the lubricating oil in the oil tank 3 is consumed, the liquid level in the oil tank 3 will gradually drop. At this time, the floating plate 92 can drive the slide bar 91 to drop synchronously with the liquid level. When the limit block 93 gradually approaches the knob 85, it means that the lubricating oil in the oil tank 3 is being consumed. By observing the distance between the limit block 93 and the knob 85, the remaining lubricating oil in the oil tank 3 can be judged, so that the staff can add lubricating oil in time according to the usage for subsequent use.

[0029] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A wear-resistant high-precision ball screw pair, comprising a ball screw (1) and a ball nut (2), characterized in that: The inner wall of the ball nut (2) is provided with an oil groove (3), the inner wall of the ball nut (2) is provided with a connecting groove (4), the ball nut (2) is provided with a through hole (5), an oil pipe (6) is fixedly mounted on the inner wall of the ball nut (2), one end of the oil pipe (6) extends to the inner wall of the oil groove (3), the other end of the oil pipe (6) is threadedly connected with a pipe cover (7), a lubrication mechanism (8) is arranged inside the ball nut (2), an auxiliary mechanism (9) is arranged on the lubrication mechanism (8), and the lubrication mechanism (8) comprises: A push rod (81), wherein the outer wall of the push rod (81) is fitted to the inner wall of the ball nut (2), one end of the push rod (81) extends to the inside of the oil groove (3) and is fixedly mounted with a piston (84), the other end of the push rod (81) is fixedly mounted with a knob (85), the outer wall of the push rod (81) is sleeved with a spring (86), one end of the spring (86) is fixedly mounted on the outer wall of the knob (85), and the other end of the spring (86) is fitted to the outer wall of the ball nut (2); An extrusion rod (82), wherein the extrusion rod (82) is slidably connected to the inner wall of the piston (84), and the extrusion rod (82) penetrates the piston (84); A sealing plate (83) is slidably connected to the inner wall of the connecting groove (4), a through opening (87) is opened on the sealing plate (83), a spring (88) is fixedly installed at one end of the sealing plate (83), the other end of the sealing plate (83) is attached to the outer wall of the extrusion rod (82), and the end of the spring (88) away from the sealing plate (83) is fixedly installed on the inner wall of the connecting groove (4).

2. The wear-resistant and high-precision ball screw pair according to claim 1, characterized in that: The auxiliary mechanism (9) comprises a sliding rod (91), and the sliding rod (91) is slidably connected to the inner wall of the push rod (81).

3. The wear-resistant and high-precision ball screw pair according to claim 2, characterized in that: One end of the slide rod (91) passes through the piston (84) and is fixedly mounted with a floating plate (92), and the other end of the slide rod (91) passes through the knob (85) and is fixedly mounted with a limit block (93).

4. The wear-resistant and high-precision ball screw pair according to claim 3 is characterized in that: The sliding rod (91) is slidably connected to the penetration point of the piston (84), and the sliding rod (91) is slidably connected to the penetration point of the knob (85).

5. The wear-resistant and high-precision ball screw pair according to claim 1, characterized in that: The communicating groove (4) is in communication with the oil groove (3), and the communicating groove (4) is in communication with the through hole (5).

6. The wear-resistant and high-precision ball screw pair according to claim 1, characterized in that: Both ends of the extrusion rod (82) are fitted on the inner wall of the oil groove (3).

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