Ball screw pair with detachable reverser structure

Abstract

The utility model discloses a ball screw pair with a detachable reverser structure, which comprises a screw rod, a nut is sleeved outside the screw rod, the outer cylindrical surface of the nut is fixedly connected with a positioning plate, the cylindrical surface of the nut is connected with a reverser in a sliding manner, the inner cylindrical surface of the reverser is provided with a sliding circular groove, and the inner cylindrical surface of the reverser is provided with a sliding groove. The outer cylindrical surface of the reverser is provided with a small round hole communicated with the sliding round groove, the reverser is provided with a fixing mechanism, the cylindrical surface of the nut is provided with a matching round groove, the side surface of the reverser makes contact with the side surface of the positioning plate, the side surface of the nut is fixedly connected with a flange plate, the flange plate does not make contact with the lead screw, and the nut is fixedly connected with the nut. The fixing mechanism comprises a pull ring, a pull rope, a spring and a sliding cylinder. According to the structure, the screw rod, the nut, the reverser, the positioning plate and the fixing mechanism are arranged, so that the reverser can be quickly mounted and dismounted, and the maintenance efficiency is improved.

Description

Technical Field

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

[0002] The ball screw pair is a screw pair with balls as rolling bodies between the screw and the nut. It is a new type of device that converts rotary motion into linear motion. Its working principle is to process arc-shaped spiral grooves on the screw and the nut respectively. The two arcs are combined to form a spiral raceway, and the balls are loaded in the raceway. When the screw rotates relative to the nut, the balls roll in the spiral raceway, forcing the two to move axially in phase.

[0003] In order to prevent the ball from rolling out of the nut, a reverser is provided at both ends of the spiral groove of the nut so that the ball can return to the screw nut to form a closed loop. However, the reverser is generally fixed with the help of an additional fixing structure and is not easy to disassemble for maintenance. Utility Model Content

[0004] The utility model provides a ball screw pair with a detachable reverser structure, which can quickly complete the installation and disassembly of the reverser, thereby improving the maintenance efficiency.

[0005] In order to achieve the above-mentioned purpose, a ball screw pair with a detachable reverser structure is provided, including a screw, a nut is sleeved on the outside of the screw, the outer cylindrical surface of the nut is fixedly connected to a positioning plate, the cylindrical surface of the nut is slidably connected to a reverser, the inner cylindrical surface of the reverser is provided with a sliding circular groove, the outer cylindrical surface of the reverser is provided with a small circular hole that penetrates the sliding circular groove, a fixing mechanism is provided on the reverser, a matching circular groove is provided on the cylindrical surface of the nut, the side surface of the reverser contacts the side surface of the positioning plate, the side surface of the nut is fixedly connected to a flange, and the flange does not contact the screw. The reverser is provided to facilitate the rolling of the ball in it to form a closed loop, the fixing mechanism is provided to facilitate the rapid installation and removal of the reverser, and the positioning plate is provided to facilitate the determination of the position of the reverser on the nut.

[0006] According to the ball screw pair of the detachable reverser structure, the fixing mechanism includes a pull ring, a pull rope, a spring, and a sliding cylinder. The sliding cylinder is slidably connected in the sliding groove and the matching groove at the same time, and the spring is fixedly connected between the sliding cylinder and the bottom side surface of the sliding groove. The sliding cylinder is provided to facilitate being stuck in the matching groove and the sliding groove at the same time, thereby fixing the angle and position of the reverser on the nut, and the spring is provided to facilitate pressing the sliding cylinder into the matching groove.

[0007] According to the ball screw pair with a detachable reverser structure, there are multiple pull ropes, which are fixedly connected to the upper surface of the sliding cylinder, the pull rope passes through the center of the spring, the pull rope passes through the small round hole on the reverser and the sliding groove, and the pull ring is fixedly connected to the end of the pull rope away from the sliding cylinder. The pull rope is provided to facilitate pulling the sliding cylinder back into the sliding groove, thereby releasing the restriction on the reverser, and multiple pull ropes can ensure that the sliding cylinder will not be pulled due to the breakage of one of the pull ropes.

[0008] According to the ball screw pair with a detachable reverser structure, the screw is provided with an outer raceway, the inner cylindrical surface of the nut is provided with an inner raceway, and the outer raceway and the inner raceway cooperate with each other. The inner raceway and the outer raceway are provided to form a complete raceway for the balls to roll therein.

[0009] According to the ball screw pair with a detachable reverser structure, a connecting raceway communicating with both ends of an inner raceway is provided on the nut, a ball channel is provided in the reverser, and both ends of the ball channel are communicated with the connecting raceways of the nuts.

[0010] According to the ball screw pair with a detachable reverser structure, a placement groove is provided on the side surface of the nut, a dust ring is provided in the placement groove, and the dust ring is ringed on the screw.

[0011] According to the ball screw pair with a detachable reverser structure, the side surface of the nut is fixedly connected to the support plate, the side surface of the nut is provided with a threaded hole away from the support plate, and the side surface of the support plate close to the dust ring is provided with a slide groove.

[0012] According to the ball screw pair with a detachable reverser structure, the support plate is slidably connected to the pressure plate, the side surface of the pressure plate is in contact with the side surface of the dust ring away from the nut, a through circular hole is provided in the center of the pressure plate, a tightening screw is passed through the through circular hole of the pressure plate, and the tightening screw is threadedly connected to the threaded hole on the side surface of the nut.

[0013] The beneficial effects of the utility model are as follows: by arranging the screw rod, the nut, the reverser, the positioning plate and the fixing mechanism, the installation and disassembly of the reverser can be completed quickly, thereby improving the maintenance efficiency.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1It is a schematic diagram of the overall structure of a ball screw pair with a detachable reverser structure of the utility model;

[0017] Figure 2 It is a cross-sectional structural diagram of the matching positions of the screw rod, nut and reverser of a ball screw pair with a detachable reverser structure of the utility model;

[0018] Figure 3 It is a schematic cross-sectional structure diagram of a nut part of a ball screw pair with a detachable reverser structure of the utility model;

[0019] Figure 4 This is an enlarged view of the local structure at point A of a ball screw pair with a detachable reverser structure of the utility model.

[0020] Legend:

[0021] 1. Screw; 101. Outer raceway; 2. Dust ring; 3. Nut; 301. Inner raceway; 302. Connecting raceway; 303. Matching groove; 304. Placement groove; 4. Reverser; 401. Ball channel; 402. Sliding groove; 5. Positioning plate; 6. Flange; 7. Fixing mechanism; 701. Pull ring; 702. Pull rope; 703. Spring; 704. Sliding cylinder; 8. Support plate; 9. Pressure plate; 10. Tighten the screw. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Reference Figure 1-4 The utility model embodiment is a ball screw pair with a detachable reverser structure, which includes a screw 1, a nut 3 is sleeved on the outside of the screw 1, the outer cylindrical surface of the nut 3 is fixedly connected to the positioning plate 5, the cylindrical surface of the nut 3 is slidably connected to the reverser 4, the inner cylindrical surface of the reverser 4 is provided with a sliding groove 402, the outer cylindrical surface of the reverser 4 is provided with a small circular hole that penetrates the sliding groove 402, a fixing mechanism 7 is provided on the reverser 4, the cylindrical surface of the nut 3 is provided with a matching groove 303, the side surface of the reverser 4 is in contact with the side surface of the positioning plate 5, the side surface of the nut 3 is fixedly connected to the flange 6, and the flange 6 does not contact the screw 1. The inner raceway 301 and the outer raceway 101 in the structure constitute the raceway, the connecting raceway 302, and the ball channel 401, in which balls are provided to roll, and when the sliding cylinder 704 is not inserted into the matching groove 303, the reverser 4 can rotate around the nut 3.

[0024] The side surface of the nut 3 is fixedly connected to the support plate 8, and a threaded hole is provided on the side surface of the nut 3 away from the support plate 8. A sliding groove is provided on the side surface of the support plate 8 close to the dust ring 2. The support plate 8 is slidably connected to the pressure plate 9. The side surface of the pressure plate 9 is in contact with the side surface of the dust ring 2 away from the nut 3. A through circular hole is provided in the center of the pressure plate 9. A tightening screw 10 is passed through the through circular hole of the pressure plate 9. The tightening screw 10 is threadedly connected to the threaded hole on the side surface of the nut 3. Twisting the tightening screw 10 can press the pressure plate 9 to fix the dust ring 2 in the placement groove 304.

[0025] An outer raceway 101 is provided on the screw rod 1, and an inner raceway 301 is provided on the inner cylindrical surface of the nut 3. The outer raceway 101 and the inner raceway 301 cooperate with each other. A connecting raceway 302 communicating with both ends of the inner raceway 301 is provided on the nut 3. A ball channel 401 is provided in the reverser 4. Both ends of the ball channel 401 are communicated with the connecting raceway 302 of the nut 3 respectively. A placement groove 304 is provided on the side surface of the nut 3. A dust ring 2 is provided in the placement groove 304. The dust ring 2 is ringed on the screw rod 1.

[0026] The fixing mechanism 7 includes a pull ring 701, a pull rope 702, a spring 703, and a sliding cylinder 704. The sliding cylinder 704 is slidably connected in the sliding groove 402 and the matching groove 303 at the same time. The spring 703 is fixedly connected between the sliding cylinder 704 and the bottom side surface inside the sliding groove 402. When the sliding cylinder 704 is inserted into the sliding groove 402 and the matching groove 303 at the same time, the two ends of the ball channel 401 and the connecting raceway 302 are completely connected, and the sliding cylinder 704 can be completely pulled into the sliding groove 402.

[0027] There are multiple pull ropes 702, which are fixedly connected to the upper surface of the sliding cylinder 704. The pull ropes 702 pass through the center of the spring 703, and the pull ropes 702 pass through the small circular hole on the reverser 4 and the sliding circular groove 402. The pull ring 701 is fixedly connected to the end of the pull rope 702 away from the sliding cylinder 704. If one of the pull ropes 702 is found to be broken during use, all the pull ropes 702 need to be replaced.

[0028] Working principle: During installation, pull the pull ring 701 through the pull rope 702 to completely pull the sliding cylinder 704 back into the sliding groove 402, and then put the reverser 4 on the outer surface of the nut 3 until the side surface of the reverser 4 contacts the side surface of the positioning plate 5, and then release the pull ring 701. At this time, the spring 703 will push the sliding cylinder 704 out of the sliding groove 402 under its own elastic force. If the angle position of the reverser 4 is incorrect at this time, the bottom of the sliding cylinder 704 will be blocked by the outer cylindrical surface of the nut 3. At this time, the reverser 4 needs to be rotated. After rotating to a suitable angle, the spring 703 will push the sliding cylinder 704 into the matching groove 303 to fix the position of the reverser 4. When disassembly is required, just pull the pull ring 701 to pull the sliding cylinder 704 out of the matching groove 303 to remove the reverser 4.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A ball screw pair with a detachable reverser structure, characterized in that: The invention comprises a screw rod (1), the screw rod (1) is sleeved with a nut (3) on the outside, the outer cylindrical surface of the nut (3) is fixedly connected to a positioning plate (5), the cylindrical surface of the nut (3) is slidably connected to a reverser (4), the inner cylindrical surface of the reverser (4) is provided with a sliding circular groove (402), the outer cylindrical surface of the reverser (4) is provided with a small circular hole that penetrates the sliding circular groove (402), the reverser (4) is provided with a fixing mechanism (7), the cylindrical surface of the nut (3) is provided with a matching circular groove (303), the side surface of the reverser (4) is in contact with the side surface of the positioning plate (5), the side surface of the nut (3) is fixedly connected to a flange (6), the flange (6) does not contact the screw rod (1), and the fixing mechanism (7) includes The invention comprises a pull ring (701), a pull rope (702), a spring (703), and a sliding cylinder (704); the sliding cylinder (704) is slidably connected in the sliding groove (402) and the matching groove (303) at the same time; the spring (703) is fixedly connected between the sliding cylinder (704) and the inner bottom surface of the sliding groove (402); there are a plurality of pull ropes (702); the pull rope (702) is fixedly connected to the upper surface of the sliding cylinder (704); the pull rope (702) passes through the center of the spring (703); the pull rope (702) passes through a small circular hole on the deflector (4) and through the sliding groove (402); and the pull ring (701) is fixedly connected to the end of the pull rope (702) away from the sliding cylinder (704).

2. The ball screw pair with a detachable reverser structure according to claim 1, characterized in that: The screw rod (1) is provided with an outer raceway (101), the inner cylindrical surface of the nut (3) is provided with an inner raceway (301), and the outer raceway (101) and the inner raceway (301) are matched.

3. The ball screw pair with a detachable reverser structure according to claim 1, characterized in that: The nut (3) is provided with a connecting raceway (302) communicating with both ends of the inner raceway (301), and the deflector (4) is provided with a ball channel (401), and both ends of the ball channel (401) are respectively communicated with the connecting raceway (302) of the nut (3).

4. The ball screw pair with a detachable reverser structure according to claim 1, characterized in that: The side surface of the nut (3) is provided with a placement groove (304), a dust ring (2) is provided in the placement groove (304), and the dust ring (2) is ringed on the screw rod (1).

5. The ball screw pair with a detachable reverser structure according to claim 1, characterized in that: The side surface of the nut (3) is fixedly connected to the support plate (8), a threaded hole is provided on the side surface of the nut (3) away from the support plate (8), and a sliding groove is provided on the side surface of the support plate (8) close to the dust ring (2).

6. The ball screw pair with a detachable reverser structure according to claim 5, characterized in that: The support plate (8) is slidably connected to the pressure plate (9), and the side surface of the pressure plate (9) contacts the side surface of the dust ring (2) away from the nut (3). A through circular hole is provided at the center of the pressure plate (9), and a tightening screw (10) is passed through the through circular hole of the pressure plate (9), and the tightening screw (10) is threadedly connected to the threaded hole on the side surface of the nut (3).

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