Ball screw pair with lubricating function

Abstract

The utility model belongs to the field of ball screw pairs, and particularly relates to a ball screw pair with a lubricating function, which comprises a screw rod, a nut is sleeved on the screw rod, a flange plate is arranged on the nut, an oil injection component is arranged on the nut and comprises an oil storage barrel and a pressing plate, a protection mechanism is arranged on the oil storage barrel, and the pressing plate is arranged on the oil storage barrel. The protection mechanism comprises a threaded sleeve, the threaded sleeve is in threaded fit with the outer wall of the oil storage barrel, a movable sleeve is in sliding fit with the oil storage barrel, an annular plate is rotationally matched with the movable sleeve, a connecting rod is fixed to the annular plate, and the end, away from the annular plate, of the connecting rod is fixedly connected with the threaded sleeve. Through the structural design of the threaded sleeve, the movable sleeve, the annular plate, the connecting rod and the L-shaped rod, the pressing plate can be limited when lubricating treatment is not carried out, the situation that lubricating oil flows out accidentally due to the fact that the pressing plate is extruded accidentally can be effectively prevented, and waste of the lubricating oil and environmental pollution are avoided.

Description

Technical Field

[0001] The utility model relates to the field of ball screw pairs, in particular to a ball screw pair with a lubrication function. Background Art

[0002] A ball screw, also known as a ball screw, is an ideal device for converting rotary motion into linear motion, or vice versa. It is the most commonly used transmission element in machine tools and precision machinery. Its primary function is to convert rotational motion into linear motion or torque into axial repetitive force. It combines high precision, reversibility, and high efficiency, making it widely used in various industrial equipment and precision instruments. A Chinese utility model patent (Announcement No.: CN221591672U) discloses a novel ball screw assembly structure. By providing an oil inlet pipe, an oil reservoir, a push plate, a push rod, a pressure plate, an oil inlet hole, and a top cover, lubricating oil is stored in the oil reservoir through the oil inlet hole. When lubrication is required, the pressure plate is pushed, driving the push rod to push the push plate. This push of the push plate pushes the lubricating oil in the oil reservoir through the oil inlet pipe to the ball raceway inside the nut for lubrication. This structure facilitates the addition of lubricating oil to the balls inside the nut, maintaining the efficiency of the device.

[0003] However, the above device still has some shortcomings when in use: specifically, when the oil storage cylinder is filled with lubricating oil, the pressure plate will protrude from the flange. Since the pressure plate lacks a corresponding protective mechanism, when the ball screw pair is working, the nut moves on the screw, and the push plate protruding from the nut is easily squeezed during the movement, thereby causing the lubricating oil to accidentally flow out, resulting in the waste of lubricating oil. Therefore, a ball screw pair with lubrication function is proposed to address the above situation. Utility Model Content

[0004] In order to remedy the problem in the prior art that the lubricating oil may accidentally leak out and waste the lubricating oil due to the lack of a corresponding protective mechanism on the pressure plate, the utility model proposes a ball screw pair with a lubricating function.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a ball screw pair with a lubrication function, including a screw, a nut is sleeved on the screw, a flange is provided on the nut, and an oil injection assembly is provided on the nut, and the oil injection assembly includes an oil storage cylinder and a pressure plate.

[0006] The oil storage cylinder is provided with a protective mechanism, which includes a threaded sleeve, which is threadedly engaged with the outer wall of the oil storage cylinder, a movable sleeve is slidably engaged with the oil storage cylinder, and an annular plate is rotatably engaged with the movable sleeve, a connecting rod is fixed on the annular plate, and the end of the connecting rod away from the annular plate is fixedly connected to the threaded sleeve.

[0007] The movable sleeve is provided with an L-shaped rod, the pressing plate is provided with a connecting plate, the connecting plate has a circular hole, and the L-shaped rod passes through the flange and matches with the circular hole.

[0008] Preferably, the oil storage cylinder has an oil storage cavity inside, and an oil outlet pipe is provided on one side of the oil storage cylinder, and the oil outlet pipe is connected to the nut.

[0009] Preferably, the outer wall of the oil storage cylinder has an external thread, and the inner wall of the threaded sleeve has an internal thread matching the external thread.

[0010] Preferably, the oil storage cylinder has an assembly opening on a side away from the oil outlet pipe, a push rod is gap-fitted in the assembly opening, one end of the push rod that penetrates into the oil storage cylinder is connected to a push plate, and the push plate is gap-fitted with the oil storage cavity.

[0011] Preferably, the push plate has a through hole, and the push rod is interference fit with the through hole.

[0012] Preferably, an oil inlet channel is provided on the push rod, the oil inlet channel is communicated with the oil storage chamber, and a triangular block is provided in the oil inlet channel.

[0013] Preferably, the oil inlet channel is provided with a sealing plug on a side away from the push plate.

[0014] Preferably, the movable sleeve has an annular groove, and the annular plate is rotatably engaged with the annular groove.

[0015] The utility model is beneficial in that:

[0016] 1. The structural design of the threaded sleeve, movable sleeve, annular plate, connecting rod and L-shaped rod of the utility model can limit the pressure plate when no lubrication is performed, effectively preventing the pressure plate from being accidentally squeezed and causing accidental leakage of lubricating oil, thereby avoiding waste of lubricating oil and environmental pollution;

[0017] 2. The utility model adopts the structural design of the oil inlet channel and the triangular block, so that when the oil storage cylinder is filled with oil, the lubricating oil can effectively flow into the oil storage cylinder, reducing the residual lubricating oil inside the oil inlet channel after filling, and improving the utilization rate of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1It is a structural diagram of the ball screw pair;

[0020] Figure 2 Schematic diagram of the installation structure of the protection mechanism;

[0021] Figure 3 It is a structural diagram of the protection mechanism;

[0022] Figure 4 Schematic diagram of the internal structure of the push rod;

[0023] Figure 5 Schematic diagram of the structure of the connecting plate.

[0024] In the figure: 1. Screw; 2. Nut; 3. Flange; 4. Oil filling assembly; 401. Oil storage cylinder; 402. Oil outlet pipe; 403. Pressure plate; 404. Push rod; 4040. Oil inlet channel; 4041. Triangular block; 405. Push plate; 406. Sealing plug; 5. Protective mechanism; 501. Threaded sleeve; 502. Moving sleeve; 503. Annular plate; 504. Connecting rod; 505. L-shaped rod; 506. Connecting plate; 5060. Round hole. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The following is combined with Figure 1-5 To further explain this application,

[0027] The embodiment of the present application discloses a ball screw pair with lubrication function. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 A ball screw pair with lubrication function includes a screw 1, a nut 2 is sleeved on the screw 1, a flange 3 is provided on the nut 2, and an oil injection component 4 is provided on the nut 2. The oil injection component 4 includes an oil storage cylinder 401 and a pressure plate 403.

[0028] A protective mechanism 5 is provided on the oil storage cylinder 401. The protective mechanism 5 includes a threaded sleeve 501, which is threadedly engaged with the outer wall of the oil storage cylinder 401. A movable sleeve 502 is slidably engaged on the oil storage cylinder 401, and an annular plate 503 is rotatably engaged on the movable sleeve 502. Specifically, the movable sleeve 502 has an annular groove, and the annular plate 503 is rotatably engaged with the annular groove. A connecting rod 504 is fixed on the annular plate 503, and the end of the connecting rod 504 away from the annular plate 503 is fixedly connected to the threaded sleeve 501.

[0029] An L-shaped rod 505 is provided on the movable sleeve 502 , and a connecting plate 506 is provided on the pressing plate 403 . The connecting plate 506 has a circular hole 5060 . The L-shaped rod 505 passes through the flange 3 and fits into the circular hole 5060 .

[0030] The movable sleeve 502 is in a circular ring shape and can be made of metal material.

[0031] The flange 3 has a through hole for cooperating with the L-shaped rod 505 .

[0032] Reference Figure 1 and Figure 2 The oil storage cylinder 401 has an oil storage cavity inside, and an oil outlet pipe 402 is provided on one side of the oil storage cylinder 401 , and the oil outlet pipe 402 is connected to the nut 2 .

[0033] The oil storage chamber is used to store lubricating oil, and the oil outlet pipe 402 delivers the lubricating oil to the nut 2 to contact the ball, thereby achieving lubrication of the ball.

[0034] Reference Figure 2 and Figure 3 The outer wall of the oil storage cylinder 401 has an external thread, and the inner wall of the threaded sleeve 501 has an internal thread that matches the external thread.

[0035] The threaded sleeve 501 can be moved by setting the thread.

[0036] Correspondingly, the threaded sleeve 501 is in a circular ring structure and can be made of metal material.

[0037] Reference Figure 2 and Figure 4 The oil storage cylinder 401 has an assembly opening on the side away from the oil outlet pipe 402, and a push rod 404 is fitted in the gap inside the assembly opening. One end of the push rod 404 that penetrates into the oil storage cylinder 401 is connected to a push plate 405, and the push plate 405 is fitted in the gap with the oil storage cavity.

[0038] Specifically, the push plate 405 has a through hole, and the push rod 404 is interference-fitted with the through hole.

[0039] Among them, the assembly port is sealed to prevent lubricating oil leakage.

[0040] The pressing plate 403 has a hollow hole, and the push rod 404 is interference fit with the hollow hole.

[0041] When in use, pushing the pressure plate 403 can move the push rod 404, and then the push plate 405 can move to allow the lubricating oil in the oil storage chamber to flow out from the oil outlet pipe 402.

[0042] Reference Figure 2 and Figure 4 An oil inlet channel 4040 is provided on the push rod 404 . The oil inlet channel 4040 is rectangular and communicates with the oil storage chamber. A triangular block 4041 is provided in the oil inlet channel 4040 .

[0043] Among them, the setting of the triangular block 4041 allows the lubricating oil to effectively flow into the oil storage cylinder 401 when filling the oil storage cylinder 401, reducing the residual lubricating oil inside the oil inlet channel 4040 after filling, and improving the utilization rate of the lubricating oil.

[0044] Reference Figure 2 and Figure 4 The oil inlet channel 4040 is provided with a sealing plug 406 on the side away from the push plate 405 .

[0045] The sealing plug 406 is made of rubber and is inserted into the oil inlet channel 4040 to seal the oil inlet of the oil inlet channel 4040 .

[0046] Working principle: When there is no need to lubricate the ball inside the nut 2, rotate the threaded sleeve 501 to move it to the right. The movement of the threaded sleeve 501 pushes the connecting rod 504 to move, thereby moving the movable sleeve 502. The movement of the movable sleeve 502 causes the L-shaped rod 505 to move and extend into the circular hole 5060, thereby limiting the connecting plate 506, that is, limiting the pressure plate 403, thereby avoiding the accidental outflow of lubricating oil when the pressure plate 403 moves to the left.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A ball screw pair with a lubricating function, comprising a screw (1), a nut (2) sleeved on the screw (1), a flange (3) provided on the nut (2), an oil injection assembly (4) provided on the nut (2), the oil injection assembly (4) comprising an oil storage cylinder (401) and a pressure plate (403), characterized in that: The oil storage cylinder (401) is provided with a protection mechanism (5), the protection mechanism (5) comprising a threaded sleeve (501), the threaded sleeve (501) being threadably engaged with the outer wall of the oil storage cylinder (401), a movable sleeve (502) being slidably engaged with the oil storage cylinder (401), an annular plate (503) being rotatably engaged with the movable sleeve (502), a connecting rod (504) being fixed to the annular plate (503), and an end of the connecting rod (504) away from the annular plate (503) being fixedly connected to the threaded sleeve (501); An L-shaped rod (505) is provided on the movable sleeve (502), a connecting plate (506) is provided on the pressing plate (403), a circular hole (5060) is provided on the connecting plate (506), and the L-shaped rod (505) passes through the flange (3) and is matched with the circular hole (5060).

2. The ball screw pair with lubrication function according to claim 1, characterized in that: The oil storage cylinder (401) has an oil storage cavity inside, and an oil outlet pipe (402) is provided on one side of the oil storage cylinder (401), and the oil outlet pipe (402) is connected to the nut (2).

3. The ball screw pair with lubrication function according to claim 2, characterized in that: The outer wall of the oil storage cylinder (401) has an external thread, and the inner wall of the threaded sleeve (501) has an internal thread that matches the external thread.

4. The ball screw pair with lubrication function according to claim 3, characterized in that: The oil storage cylinder (401) has an assembly opening on a side away from the oil outlet pipe (402), a push rod (404) is clearance-matched in the assembly opening, and one end of the push rod (404) that penetrates into the oil storage cylinder (401) is connected to a push plate (405), and the push plate (405) is clearance-matched with the oil storage cavity.

5. The ball screw pair with lubrication function according to claim 4, characterized in that: The push plate (405) has a through hole, and the push rod (404) is interference-fitted with the through hole.

6. The ball screw pair with lubrication function according to claim 5, characterized in that: An oil inlet channel (4040) is provided on the push rod (404), the oil inlet channel (4040) is communicated with the oil storage chamber, and a triangular block (4041) is provided in the oil inlet channel (4040).

7. The ball screw pair with lubrication function according to claim 6, characterized in that: The oil inlet channel (4040) is provided with a sealing plug (406) on a side away from the push plate (405).

8. The ball screw pair with lubrication function according to claim 1, characterized in that: The movable sleeve (502) has an annular groove, and the annular plate (503) is rotatably engaged with the annular groove.

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