Connecting shaft ball screw pair structure

Abstract

The utility model provides a connecting shaft ball screw pair structure, which relates to the technical field of ball screws and comprises a screw, a screw rolling groove is arranged on the outer surface wall of the screw, two groups of bearing components are arranged on the outer surface wall of the screw, oil storage components are arranged on the outer surface walls of the two groups of bearing components, a ball nut is arranged on the outer surface wall of the screw, and the ball nut is connected with the screw rolling groove. A group of lead screw balls are arranged on the inner wall of the ball nut, the group of lead screw balls are arranged on the inner wall of the lead screw rolling groove and the inner wall of the ball nut in a rolling mode, an oil injection hole is formed in the top end of the ball nut, an oil storage groove is formed in the bottom end of the inner wall of the oil injection hole, and a group of third oil leakage holes are formed in the bottom end of the inner wall of the oil storage groove; the bearing assembly is provided with the oil storage assembly, the oil storage assembly can evenly add lubricating oil into the bearing assembly, then the friction force in the bearing assembly is reduced, the ball nut is provided with the oil injection hole, and lubricating oil can be conveniently added into the ball nut.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screws, in particular to a coupling ball screw pair structure. Background Art

[0002] Ball screws are the most commonly used transmission components in tool machinery and precision machinery. Their main function is to convert rotational motion into linear motion, or torque into axial repetitive force. They also have the characteristics of high precision, reversibility and high efficiency. Due to their very low friction resistance, ball screws are widely used in various industrial equipment and precision instruments, with good performance.

[0003] Existing authorization announcement number CN217713539U describes a coupled ball screw pair structure, which includes a screw and a ball nut. The screw consists of a screw portion and a polished rod portion, with the polished rod portions at both ends. The screw portion is provided with a screw raceway corresponding to the ball nut, and the ball nut is mounted on the screw via the screw raceway. The screw is also provided with a bearing, which includes a bearing inner sleeve, a bearing outer sleeve, and bearing balls with a retainer. The bearing inner sleeve is provided on the screw, and a bearing raceway corresponding to the bearing balls is provided on the outer side surface of the bearing inner sleeve. The bearing balls are mounted in the bearing raceway. The bearing outer sleeve is rotatably connected to the bearing inner sleeve via the bearing balls. The coupled ball screw pair structure described in the utility model integrates the bearing and the screw into an integrated structure, making the structure simpler and more compact, ensuring the same concentricity between the bearing and the ball screw, and meeting the use requirements of specific occasions, making it particularly suitable for promotion and use.

[0004] Although the above patent is provided with bearings to facilitate the rotation of the ball screw, the ball screw needs to be frequently lubricated when rotating to reduce the friction in the bearing and make the operation between the bearing and the ball screw smoother. However, the above patent is inconvenient to add lubricating oil to the bearing. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that it is inconvenient to add lubricating oil into the bearing, and to propose a coupling ball screw pair structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a connecting shaft ball screw pair structure, including a screw, the outer wall of the screw is provided with a screw rolling groove, the outer wall of the screw is provided with two groups of bearing assemblies, the outer walls of the two groups of bearing assemblies are provided with oil storage assemblies, the outer wall of the screw is provided with a ball nut, the inner wall of the ball nut is provided with a group of screw balls, one group of the screw balls is rolled in the screw rolling groove and the inner wall of the ball nut, and an oil filling hole is provided at the top of the ball nut.

[0007] Preferably, the bearing assembly includes a bearing outer ring and a bearing inner ring, the inner wall of the bearing outer ring is provided with an outer ring rolling groove, the outer wall of the bearing inner ring is provided with an inner ring rolling groove, and a group of bearing balls are rolled on the inner walls of the outer ring rolling groove and the inner ring rolling groove.

[0008] Preferably, an oil storage circular groove is opened inside the outer ring of the bearing, a group of first oil leakage holes are opened through the inner wall of the oil storage circular groove, and the group of first oil leakage holes are interconnected with the oil storage circular groove, and a second oil leakage hole is opened through the inner wall of the oil storage circular groove.

[0009] Preferably, the oil storage assembly includes an oil storage box, the outer wall of the oil storage box is provided with a transparent observation window, the top of the oil storage box is provided with an oil filling cap, the top of the oil storage box is fixedly installed with a fixing plate, the top of the fixing plate is movably inserted with a pull rod, the bottom end of the pull rod passes through the top of the fixing plate and the top of the oil storage box, and is fixedly installed with a hole-blocking plate, the hole-blocking plate is in contact with the inner wall of the oil storage box, and the top of the pull rod is fixedly installed with a pull plate.

[0010] Preferably, an oil storage tank is provided at the bottom end of the inner wall of the oil filling hole, and a group of third oil leakage holes is provided at the bottom end of the inner wall of the oil storage tank.

[0011] Preferably, the two bearing inner rings are fixedly connected to the lead screw, the two oil storage boxes are fixedly connected to the two bearing outer rings respectively, and the two second oil leakage holes are communicated with the two oil storage boxes respectively.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are:

[0013] 1. In the present invention, when it is necessary to add lubricating oil to the bearing assembly, first add lubricating oil to the oil storage box through the oil filling cap, then pull the pull plate, and the pull plate drives the plugging plate to rise through the pull rod, and then the lubricating oil in the oil storage box flows into the oil storage circular groove through the second oil leakage hole, and the oil storage circular groove then drips the lubricating oil evenly into the bearing assembly through a group of first oil leakage holes, thereby facilitating the addition of lubricating oil to the inside of the bearing assembly and reducing the friction inside the bearing assembly.

[0014] 2. In the present invention, when the connection between the ball nut and the lead screw needs to be lubricated, the lubricating oil is first injected into the oil storage tank through the oil filling hole. The lubricating oil in the oil storage tank will slowly drip to the connection between the ball nut and the lead screw through a set of third oil leakage holes, thereby reducing the friction between the ball nut and the lead screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a coupling ball screw pair structure proposed by the utility model;

[0016] Figure 2This is a cross-sectional view of the overall structure of a coupling ball screw pair structure proposed in the utility model;

[0017] Figure 3 This is a cross-sectional view of a bearing assembly in a coupling ball screw structure proposed in the present invention;

[0018] Figure 4 This is a cross-sectional view of a bearing assembly in a coupling ball screw structure proposed in the present invention from another perspective;

[0019] Figure 5 This is a cross-sectional view of an oil storage component in a coupling ball screw pair structure proposed by the utility model.

[0020] Legend: 1. Screw; 2. Screw groove; 3. Bearing assembly; 301. Bearing outer ring; 302. Bearing inner ring; 303. Outer ring groove; 304. Inner ring groove; 305. Bearing ball; 306. Oil storage groove; 307. First oil leakage hole; 308. Second oil leakage hole; 4. Oil storage assembly; 401. Oil storage box; 402. Transparent observation window; 403. Oil filling cap; 404. Fixing plate; 405. Pull rod; 406. Blocking plate; 407. Pull plate; 5. Ball nut; 6. Screw ball; 7. Oil filling hole; 8. Oil storage tank; 9. Third oil leakage hole. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figure 1-Figure 5 As shown, the utility model provides a coupling ball screw pair structure, including a screw 1, an outer wall of the screw 1 is provided with a screw rolling groove 2, the outer wall of the screw 1 is provided with two groups of bearing assemblies 3, the outer walls of the two groups of bearing assemblies 3 are provided with oil storage assemblies 4, the outer wall of the screw 1 is provided with a ball nut 5, the inner wall of the ball nut 5 is provided with a group of screw balls 6, a group of screw balls 6 are rolled and arranged in the screw rolling groove 2 and the inner wall of the ball nut 5, and an oil filling hole 7 is provided at the top of the ball nut 5.

[0024] The effect achieved by the entire embodiment 1 is that an oil storage component 4 is provided on the bearing component 3, and the oil storage component 4 can evenly add lubricating oil into the bearing component 3, thereby reducing the friction in the bearing component 3, and an oil filling hole 7 is provided on the ball nut 5 to facilitate the addition of lubricating oil into the ball nut 5.

[0025] Example 2, as Figure 1-Figure 5 As shown, the bearing assembly 3 includes a bearing outer ring 301 and a bearing inner ring 302. The inner wall of the bearing outer ring 301 is provided with an outer ring rolling groove 303, and the outer wall of the bearing inner ring 302 is provided with an inner ring rolling groove 304. A group of bearing balls 305 are rollingly mounted on the inner walls of the outer ring rolling groove 303 and the inner ring rolling groove 304. The inner wall of the bearing outer ring 301 is provided with an oil storage groove 306. The inner wall of the oil storage groove 306 is provided with a group of first oil leakage holes 307, which are all connected to the oil storage groove 306. The inner wall of the oil storage groove 306 is provided with a second oil leakage hole 308. The oil storage assembly 4 includes an oil storage box 401, the outer wall of which is provided with a transparent observation window 402. An oil filling cap 403 is located at the top of the oil storage box 401. A fixed plate 404 is fixedly mounted at the top of the oil storage box 401. A pull rod 405 is movably inserted into the top of the fixed plate 404. The bottom end of the pull rod 405 passes through the top of the fixed plate 404 and the top of the oil storage box 401, and is then fixedly mounted with a hole-blocking plate 406. The hole-blocking plate 406 contacts the inner wall of the oil storage box 401. A pull plate 407 is fixedly mounted at the top of the pull rod 405. An oil reservoir 8 is defined at the bottom end of the inner wall of the oil filling hole 7. A set of third oil leakage holes 9 are defined at the bottom end of the inner wall of the oil reservoir 8. The two bearing inner rings 302 are fixedly connected to the lead screw 1. The two oil storage boxes 401 are fixedly connected to the two bearing outer rings 301, respectively. The two second oil leakage holes 308 communicate with the two oil storage boxes 401, respectively.

[0026] The effect achieved by the entire embodiment 2 is that lubricating oil is first added to the oil storage box 401 through the oil filling cap 403, and then the pull plate 407 is pulled. The pull plate 407 drives the plugging plate 406 to rise through the pull rod 405, and then the lubricating oil in the oil storage box 401 flows into the oil storage groove 306 through the second oil leakage hole 308. The oil storage groove 306 then drips the lubricating oil evenly into the inside of the bearing assembly 3 through a group of first oil leakage holes 307, thereby facilitating the addition of lubricating oil to the inside of the bearing assembly 3. The transparent observation window 402 makes it convenient for the staff to observe the remaining oil amount in the oil storage box 401.

[0027] Working principle: First, install the device in a suitable position. When it is necessary to add lubricating oil to the bearing assembly 3, first add lubricating oil to the oil storage box 401 through the oil filling cap 403, and then pull the pull plate 407. The pull plate 407 drives the plugging plate 406 to rise through the pull rod 405. Then the lubricating oil in the oil storage box 401 flows into the oil storage groove 306 through the second oil leakage hole 308. The oil storage groove 306 then drips the lubricating oil evenly into the bearing assembly 3 through a group of first oil leakage holes 307, thereby facilitating the addition of lubricating oil to the inside of the bearing assembly 3 and reducing the friction in the bearing assembly 3. When it is necessary to lubricate the connection between the ball nut 5 and the screw 1, first inject the lubricating oil into the oil storage tank 8 through the oil filling hole 7. The lubricating oil in the oil storage tank 8 will slowly drip to the connection between the ball nut 5 and the screw 1 through a group of third oil leakage holes 9, thereby reducing the friction at the connection between the ball nut 5 and the screw 1.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A coupling ball screw pair structure, characterized in that: The invention comprises a screw (1), wherein the outer wall of the screw (1) is provided with a screw rolling groove (2), the outer wall of the screw (1) is provided with two groups of bearing assemblies (3), the outer walls of the two groups of bearing assemblies (3) are both provided with oil storage assemblies (4), the outer wall of the screw (1) is provided with a ball nut (5), the inner wall of the ball nut (5) is provided with a group of screw balls (6), the group of screw balls (6) is rollingly arranged on the screw rolling groove (2) and the inner wall of the ball nut (5), the top of the ball nut (5) is provided with an oil filling hole (7), the oil storage assembly (4) comprises an oil storage box (401), the storage The outer wall of the oil box (401) is provided with a transparent observation window (402), the top of the oil storage box (401) is provided with an oil filling cap (403), the top of the oil storage box (401) is fixedly installed with a fixing plate (404), the top of the fixing plate (404) is movably inserted with a pull rod (405), the bottom end of the pull rod (405) passes through the top of the fixing plate (404) and the top of the oil storage box (401), and is fixedly installed with a hole blocking plate (406), the hole blocking plate (406) is in contact with the inner wall of the oil storage box (401), and the top of the pull rod (405) is fixedly installed with a pull plate (407).

2. The coupling ball screw pair structure according to claim 1, characterized in that: The bearing assembly (3) comprises a bearing outer ring (301) and a bearing inner ring (302), the inner wall of the bearing outer ring (301) is provided with an outer ring rolling groove (303), the outer wall of the bearing inner ring (302) is provided with an inner ring rolling groove (304), and a group of bearing balls (305) are rollingly arranged on the inner walls of the outer ring rolling groove (303) and the inner ring rolling groove (304).

3. The coupling ball screw pair structure according to claim 2, characterized in that: An oil storage circular groove (306) is provided inside the bearing outer ring (301), a group of first oil leakage holes (307) are provided through the inner wall of the oil storage circular groove (306), the group of first oil leakage holes (307) are all interconnected with the oil storage circular groove (306), and a second oil leakage hole (308) is provided through the inner wall of the oil storage circular groove (306).

4. The coupling ball screw pair structure according to claim 3, characterized in that: An oil storage groove (8) is provided at the bottom end of the inner wall of the oil filling hole (7), and a group of third oil leakage holes (9) is provided at the bottom end of the inner wall of the oil storage groove (8).

5. The coupling ball screw pair structure according to claim 4, characterized in that: The two bearing inner rings (302) are fixedly connected to the lead screw (1), the two oil storage boxes (401) are respectively fixedly connected to the two bearing outer rings (301), and the two second oil leakage holes (308) are respectively communicated with the two oil storage boxes (401).

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