Ball screw pair with self-lubricating oil tank

Abstract

The utility model relates to the technical field of ball screw pairs, in particular to a ball screw pair with a self-lubricating oil tank, which comprises a ball screw pair, the top of the ball screw pair is detachably connected with a lubricating oil tank component, and a connecting component is arranged at the joint of the lubricating oil tank component and the ball screw pair. The lubricating oil tank assembly comprises a hollow lubricating oil storage tank, an electric motor is fixed to the top of the lubricating oil storage tank, a stirring shaft used for stirring lubricating oil is fixed to the power output end of the electric motor, and a heating pipe is fixed to the interior of the lubricating oil storage tank and located on one side of the stirring shaft. The heating pipe is additionally arranged in the lubricating oil storage tank, lubricating oil can be heated in a low-temperature environment, meanwhile, the electric motor can drive the stirring shaft to rotate, the stirring shaft stirs the lubricating oil, local overheating of the lubricating oil is avoided, and the situation that normal lubrication of a ball screw pair is affected by solidification of the lubricating oil is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ball screw assembly technology, and in particular to a ball screw assembly with a self-lubricating oil tank. Background Technology

[0002] Ball screw pairs are high-precision and commonly used transmission devices in transmission machinery. They consist of a screw, a nut, and balls. The conversion between rotary motion and linear motion is achieved by the rolling of the balls in the helical raceway between the screw and the nut.

[0003] In order to reduce the friction between the balls, raceways and cage in the ball screw assembly during use, the ball screw assembly is lubricated with a lubricant. However, the existing lubrication method is to apply lubricant to the ball screw assembly in advance, which is inconvenient to use.

[0004] The existing publicly available technical solution, announcement number CN220890977U, discloses a ball screw assembly with a self-lubricating oil tank, including a base plate, on both sides of the upper surface of the base plate. The ball screw assembly with a self-lubricating oil tank, through the setting of the lubrication component, lubricating oil inside the self-lubricating oil tank body lubricates the screw through the oil outlet pipe, and can also lubricate the balls inside the nut.

[0005] In actual implementation, the above technical solution uses a self-lubricating oil tank to store lubricating oil. The self-lubricating oil tank has a simple structure. However, when the ball screw assembly is used in a low-temperature environment, it cannot heat the lubricating oil. In a low-temperature environment, the lubricating oil has poor fluidity, which leads to lubrication failure during startup. Summary of the Invention

[0006] The purpose of this utility model is to provide a ball screw assembly with a self-lubricating oil tank. By adding a heating tube inside the lubricating oil storage tank, the lubricating oil can be heated in a low-temperature environment. At the same time, the electric motor can drive the stirring shaft to rotate, and the stirring shaft can stir the lubricating oil, thereby avoiding local overheating of the lubricating oil and preventing the lubricating oil from solidifying and affecting the normal lubrication of the ball screw assembly, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a ball screw assembly with a self-lubricating oil tank, comprising a ball screw assembly, wherein a lubricating oil tank assembly is detachably connected to the top of the ball screw assembly, and a connecting assembly is provided at the connection between the lubricating oil tank assembly and the ball screw assembly;

[0008] The lubricating oil tank assembly includes a hollow lubricating oil storage tank. An electric motor is fixed to the top of the lubricating oil storage tank, and a stirring shaft for stirring the lubricating oil is fixed to the power output end of the electric motor. A heating tube is fixed inside the lubricating oil storage tank, and the heating tube is located on one side of the stirring shaft.

[0009] Preferably, the lubricating oil tank assembly further includes an oil injection pipe fixed to the left and right sides of the lubricating oil storage tank. A miniature solenoid valve is fixed to one end of the oil injection pipe near the lubricating oil storage tank, and a nozzle is fixed to the bottom of the oil injection pipe. The oil injection direction of the nozzle is towards the ball screw pair.

[0010] Preferably, the lubricating oil tank assembly further includes a tapered tube fixedly connected to the bottom of the lubricating oil storage tank, the tapered tube being in communication with the lubricating oil storage tank.

[0011] Preferably, the ball screw assembly includes a motor housing, a screw bracket is fixed on one side of the motor housing, a screw body is rotatably mounted inside the screw bracket, and guide rods that are parallel to each other are provided on the left and right sides of the screw body.

[0012] Preferably, a ball nut is connected to the outer side of the lead screw body, and a connecting tube is fixed to the top of the ball nut. The connecting tube passes through the top of the ball nut, and a duckbill valve is fixed inside the connecting tube.

[0013] Preferably, the connecting assembly includes fixed lugs fixed to the front and rear sides of the lubricating oil storage tank, and a connecting screw fixed to the top of the ball nut, the connecting screw passing through the interior of the fixed lugs.

[0014] Preferably, a connecting spring is sleeved on the outer side of the connecting screw, and a support plate sleeved on the outside of the connecting screw is fixed to the top of the connecting spring, and a connecting nut is threaded to the top of the connecting screw.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By adding a heating tube inside the lubricating oil storage tank, the lubricating oil can be heated in a low-temperature environment. At the same time, the electric motor can drive the stirring shaft to rotate, and the stirring shaft can stir the lubricating oil, avoiding local overheating of the lubricating oil and preventing the lubricating oil from solidifying and affecting the normal lubrication of the ball screw assembly.

[0017] 2. The connecting components allow for easy installation of the lubricating oil storage tank on top of the ball nut, and easy replacement of the lubricating oil storage tank if it is damaged. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an overall structural view of the present invention;

[0020] Figure 2 This is a schematic diagram of the lubricating oil tank assembly of this utility model when it is separated;

[0021] Figure 3 This is a bottom view of the structure of the lubricating oil storage tank of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the stirring shaft of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Ball screw assembly; 101. Motor housing; 102. Screw support; 103. Guide rod; 104. Ball nut; 105. Screw body; 106. Connecting pipe; 107. Duckbill valve; 2. Lubricating oil tank assembly; 201. Lubricating oil storage tank; 202. Heating element; 203. Electric motor; 204. Miniature solenoid valve; 205. Oil injection pipe; 206. Nozzle; 207. Tapered tube; 208. Stirring shaft; 3. Connecting assembly; 301. Fixing lug; 302. Connecting nut; 303. Connecting screw; 304. Support plate; 305. Connecting spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0026] This utility model provides a technical solution:

[0027] Please see Figures 1 to 4 A ball screw assembly with a self-lubricating oil tank includes a ball screw assembly 1, a lubricating oil tank assembly 2 is detachably connected to the top of the ball screw assembly 1, and a connecting assembly 3 is provided at the connection between the lubricating oil tank assembly 2 and the ball screw assembly 1.

[0028] The lubricating oil tank assembly 2 includes a hollow lubricating oil storage tank 201. An electric motor 203 is fixed to the top of the lubricating oil storage tank 201, and a stirring shaft 208 for stirring the lubricating oil is fixed to the power output end of the electric motor 203. A heating tube 202 is fixed inside the lubricating oil storage tank 201, and the heating tube 202 is located on one side of the stirring shaft 208.

[0029] The lubricating oil tank assembly 2 also includes an oil spray pipe 205 fixed on the left and right sides of the lubricating oil storage tank 201. A miniature solenoid valve 204 is fixed at one end of the oil spray pipe 205 near the lubricating oil storage tank 201, and a nozzle 206 is fixed at the bottom of the oil spray pipe 205. The spray direction of the nozzle 206 is towards the ball screw assembly 1. The lubricating oil tank assembly 2 also includes a tapered tube 207 fixedly connected to the bottom of the lubricating oil storage tank 201. The tapered tube 207 is interconnected with the lubricating oil storage tank 201.

[0030] By adopting the above technical solution, a heating tube 202 is installed inside the lubricating oil storage tank 201. The top of the heating tube 202 is located above the lubricating oil storage tank 201, and the heating end is embedded inside the lubricating oil storage tank 201. After the heating tube 202 is connected to electricity, it can heat the lubricating oil inside the lubricating oil storage tank 201. At the same time, the electric motor 203 can be started, which can drive the stirring shaft 208 to rotate. The stirring shaft 208 stirs the lubricating oil, avoiding local overheating of the lubricating oil, facilitating heating of the lubricating oil in low-temperature environments, and preventing the lubricating oil from solidifying and affecting the normal lubrication of the ball screw assembly 1. When the micro solenoid valve 204 is activated, lubricating oil flows out from the oil injection pipe 205 and is sprayed onto the screw body 105 of the ball screw assembly 1 through the nozzle 206 to lubricate the screw body 105. On the other hand, lubricating oil can flow out from the tapered pipe 207 to lubricate the ball nut 104. By adding a heating pipe 202 in the lubricating oil storage tank 201, the lubricating oil can be heated in a low-temperature environment. At the same time, the electric motor 203 can drive the stirring shaft 208 to rotate, and the stirring shaft 208 stirs the lubricating oil to avoid local overheating of the lubricating oil and prevent the lubricating oil from solidifying and affecting the normal lubrication of the ball screw assembly 1.

[0031] Specifically, such as Figure 2 As shown, the ball screw assembly 1 includes a motor housing 101. A screw bracket 102 is fixed on one side of the motor housing 101. A screw body 105 is rotatably mounted inside the screw bracket 102. Parallel guide rods 103 are provided on the left and right sides of the screw body 105. A ball nut 104 is connected to the outside of the screw body 105. A connecting pipe 106 is fixed to the top of the ball nut 104. The connecting pipe 106 passes through the top of the ball nut 104. A duckbill valve 107 is fixed inside the connecting pipe 106.

[0032] The connecting assembly 3 includes a fixing lug plate 301 fixed to the front and rear sides of the lubricating oil storage tank 201, and a connecting screw 303 fixed to the top of the ball nut 104. The connecting screw 303 passes through the interior of the fixing lug plate 301. A connecting spring 305 is sleeved on the outside of the connecting screw 303, and a support plate 304 sleeved on the outside of the connecting screw 303 is fixed on the top of the connecting spring 305. A connecting nut 302 is threadedly connected to the top of the connecting screw 303. After the connecting screw 303 passes through the fixing lug plate 301, the connecting nut 302 is threadedly connected to the connecting screw 303 and is located above the fixing lug plate 301.

[0033] By adopting the above technical solution, a silicone plug is also movably connected to the top of the lubricating oil storage tank 201 for replenishing lubricating oil. A fixing lug 301 on the lubricating oil storage tank 201 is inserted into the connecting screw 303, and a rotatable connecting nut 302 is spun into the connecting screw 303. The connecting nut 302 is threadedly connected to the connecting screw 303 to install the lubricating oil storage tank 201. The lubricating oil storage tank 201 moves downwards, thereby pressing the support plate 304 through the fixing lug 301. The connecting spring 305 at the bottom of the support plate 304 compresses inwards, and the lubricating oil storage tank 201 is installed onto... After positioning, the closed end of the duckbill valve 107 is located inside the connecting pipe 106. The tapered tube 207 at the bottom of the lubricating oil storage tank 201 can be inserted into the duckbill valve 107, thereby opening the closed end of the duckbill valve 107. The lubricating oil in the lubricating oil storage tank 201 can enter the connecting pipe 106 through the duckbill valve 107, thereby lubricating the ball nut 104. Through the provided connecting component 3, the lubricating oil storage tank 201 can be easily installed on the top of the ball nut 104. If the lubricating oil storage tank 201 is damaged, it can be easily replaced with a new lubricating oil storage tank 201.

[0034] Working principle: The fixing lug 301 on the lubricating oil storage tank 201 is inserted into the connecting screw 303, and the rotatable connecting nut 302 is threadedly connected to the connecting screw 303 to install the lubricating oil storage tank 201. The lubricating oil storage tank 201 moves downward, thereby pressing the support plate 304 through the fixing lug 301. The connecting spring 305 at the bottom of the support plate 304 is compressed inward, and the lubricating oil storage tank 201 is installed in place. In a low-temperature environment, the heating tube 202 is powered to heat the lubricating oil inside the lubricating oil storage tank 201. At the same time, the electric motor 203 can be started, which drives the stirring shaft 208 to rotate. The stirring shaft 208 stirs the lubricating oil, avoiding local overheating of the lubricating oil and facilitating heating of the lubricating oil in low-temperature environments. To prevent the lubricating oil from solidifying and affecting the normal lubrication of the ball screw assembly 1, the tapered tube 207 at the bottom of the lubricating oil storage tank 201 is inserted into the duckbill valve 107. By opening the closed end of the duckbill valve 107, the lubricating oil in the lubricating oil storage tank 201 can enter the connecting pipe 106 through the duckbill valve 107, thereby lubricating the ball nut 104. At the same time, the micro solenoid valve 204 is activated, and the lubricating oil flows out from the oil spray pipe 205 and is sprayed onto the screw body 105 of the ball screw assembly 1 through the nozzle 206 to lubricate the screw body 105. A servo motor is installed inside the motor housing 101. The power output end of the servo motor is fixedly connected to the screw body 105. The servo motor can drive the screw body 105 to rotate, thereby driving the ball nut 104 to move on the screw body 105.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ball screw assembly with a self-lubricating oil tank, comprising a ball screw assembly (1), characterized in that: The top of the ball screw assembly (1) is detachably connected to a lubricating oil tank assembly (2), and a connecting assembly (3) is provided at the connection between the lubricating oil tank assembly (2) and the ball screw assembly (1). The lubricating oil tank assembly (2) includes a hollow lubricating oil storage tank (201). An electric motor (203) is fixed to the top of the lubricating oil storage tank (201), and a stirring shaft (208) for stirring the lubricating oil is fixed to the power output end of the electric motor (203). A heating tube (202) is fixed inside the lubricating oil storage tank (201), and the heating tube (202) is located on one side of the stirring shaft (208).

2. A ball screw assembly with a self-lubricating oil tank according to claim 1, characterized in that: The lubricating oil tank assembly (2) also includes an oil spray pipe (205) fixed on the left and right sides of the lubricating oil storage tank (201). A miniature solenoid valve (204) is fixed at one end of the oil spray pipe (205) near the lubricating oil storage tank (201), and a nozzle (206) is fixed at the bottom of the oil spray pipe (205). The spray direction of the nozzle (206) is towards the ball screw pair (1).

3. A ball screw assembly with a self-lubricating oil tank according to claim 2, characterized in that: The lubricating oil tank assembly (2) also includes a tapered tube (207) fixedly connected to the bottom of the lubricating oil storage tank (201), and the tapered tube (207) is in communication with the lubricating oil storage tank (201).

4. A ball screw assembly with a self-lubricating oil tank according to claim 3, characterized in that: The ball screw assembly (1) includes a motor housing (101), a screw bracket (102) is fixed on one side of the motor housing (101), a screw body (105) is rotatably installed inside the screw bracket (102), and guide rods (103) are provided on the left and right sides of the screw body (105).

5. A ball screw assembly with a self-lubricating oil tank according to claim 4, characterized in that: A ball nut (104) is connected to the outside of the lead screw body (105), and a connecting tube (106) is fixed to the top of the ball nut (104). The connecting tube (106) passes through the top of the ball nut (104), and a duckbill valve (107) is fixed inside the connecting tube (106).

6. A ball screw assembly with a self-lubricating oil tank according to claim 5, characterized in that: The connecting assembly (3) includes a fixing lug plate (301) fixed to the front and rear sides of the lubricating oil storage tank (201), and a connecting screw (303) fixed to the top of the ball nut (104), the connecting screw (303) passing through the interior of the fixing lug plate (301).

7. A ball screw assembly with a self-lubricating oil tank according to claim 6, characterized in that: A connecting spring (305) is sleeved on the outside of the connecting screw (303), and a support plate (304) sleeved on the outside of the connecting screw (303) is fixed on the top of the connecting spring (305). A connecting nut (302) is threadedly connected to the top of the connecting screw (303).

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