Ball screw pretightening force adjusting device

Abstract

The utility model discloses a ball screw pretightening force adjusting device, and relates to the technical field of ball screws, the ball screw pretightening force adjusting device comprises a screw body, the surface of the screw body is provided with a first nut and a second nut, the surface of the first nut is fixedly connected with a connecting rod, and the surface of the second nut is fixedly connected with the connecting rod. The end, away from the first nut, of the connecting rod is fixedly connected with a fixing block, sleeves are arranged on the surfaces of the first nut and the second nut, grooves are formed in the sleeves, rotating sleeves are in threaded connection with the surfaces of the sleeves, fixing shells are fixedly connected with the interiors of the rotating sleeves, and sliding rods are slidably connected with the interiors of the sleeves. And the sliding rod penetrates into the fixing shell, the inner wall of the fixing shell is slidably connected with the surface of the sliding rod, through the arrangement of thread locking, the position of the sliding block can be locked, the situation that the sliding block moves due to elasticity of a spring is avoided, and a worker can conveniently control adjustment of the pre-tightening force.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball screw technical field, especially a ball screw pre -tightening force adjusting device. BACKGROUND

[0002] Ball screw is the ideal product of converting rotary motion into linear motion, or converting linear motion into rotary motion, ball screw is the most commonly used transmission element in tool machinery and precision machinery, its main function is to convert rotary motion into linear motion, or convert torque into axial reciprocating force, while having high precision, reversibility and high efficiency.

[0003] The utility model discloses a kind of pre-tightening force adjusting mechanisms of double-nut ball screw, by setting clamping assembly and adjusting assembly, effect of limiting and force applying to nut is played, effectively prevent the phenomenon that nut appears connection slack after being subjected to large load, improve the stability of equipment, by setting the sliding between first slider and base, so that the height of adjusting base and the elasticity of high-pressure spring can be adjusted to play the effect of adjusting pre-tightening force, compared with traditional mode, the equipment makes screw suitable for different situations, and it is more diverse to use.

[0004] However, during the implementation of the device, the sliding of the base is controlled by the high-pressure spring, thereby pushing the first slider, and since the spring itself has elastic characteristics, the high-pressure spring cannot lock the sliding of the base, thereby causing the device to shake during movement, which causes the base to slide, and the sliding base cannot lock the first slider, thereby affecting the position of the first crossbar, which affects the use of the nut, and further affects the adjusting effect of the device, affecting the adjustment of the pre-tightening force by the staff, therefore, a ball screw pre-tightening force adjusting device is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art, and provides a ball screw pre-tightening force adjusting device, which can solve the problems in the background art.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a ball screw pre -tightening force adjusting device, including screw body, the surface of screw body is provided with first nut and second nut, the surface fixedly connected with connecting rod of first nut, the end fixedly connected with fixed block of connecting rod away from first nut, the surface of first nut and second nut is provided with sleeve, the recess is set up in the inside of sleeve, the surface of sleeve is connected with rotating sleeve, the inside fixedly connected with fixed shell of rotating sleeve, the inside slidingly connected with sliding rod of sleeve, sliding rod passes to fixed shell inside, the inner wall of fixed shell and the surface of sliding rod are slidingly connected.

[0007] Preferably, the surface structure of the first nut and the second nut is same, and the surface of the fixed block is inclined.

[0008] Preferably, the inner wall of the recess is slidingly connected with a sliding block, and the sliding block is trapezoidal.

[0009] Preferably, the inside of the fixed shell is provided with a limiting groove, and the limiting groove is inclined.

[0010] Preferably, the inside of the sliding rod is slidingly connected with a limiting rod, and the surface of the limiting rod is slidingly connected with the inner wall of the limiting groove.

[0011] Preferably, the surface of the fixed block is embedded with a first ball, and the two ends of the limiting rod are fixedly connected with second balls.

[0012] Preferably, the surface of the sliding block is provided with a sliding groove, and the sliding groove corresponds to the fixed block.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1), the ball screw pre -tightening force adjusting device, through the rotation of rotating sleeve, makes the sliding block move, thereby controls the distance between first nut and second nut, avoids the use of spring, and through the setting of thread locking, can lock the position of sliding block, avoids the situation that the sliding block moves due to the elasticity of spring, is convenient for staff to control the adjustment of pre -tightening force, and is convenient for staff to use.

[0015] (2), the ball screw pre -tightening force adjusting device, through the setting of first ball, when the first ball moves with the movement of sliding block, makes the sliding block and first ball contact, thereby reducing the friction between fixed block and sliding block, thereby reducing the abrasion of device.

[0016] (3), the ball screw pre-tightening force adjusting device, through the setting of the second ball, because the both ends of the limiting rod are arranged in the limiting groove, when the limiting groove moves and contacts the second ball on the limiting rod, thereby reducing the friction between the limiting rod and the limiting groove, thereby increasing the service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further explained in connection with the drawings and examples:

[0018] Figure 1 It is surface structure schematic drawing of screw body of the utility model;

[0019] Figure 2 It is structure schematic drawing of first nut and second nut of the utility model;

[0020] Figure 3 It is internal structure schematic drawing of rotating sleeve of the utility model;

[0021] Figure 4 It is surface structure schematic drawing of sliding block of the utility model;

[0022] Figure 5 It is internal structure schematic drawing of fixed shell of the utility model.

[0023] Reference signs: 1, screw body; 2, first nut; 3, sleeve; 4, rotating sleeve; 5, anti-skid line; 6, connecting rod; 7, fixed block; 8, first ball; 9, second nut; 10, fixed shell; 11, sliding rod; 12, sliding block; 13, limiting rod; 14, second ball; 15, sliding groove; 16, recess; 17, limiting groove. DETAILED DESCRIPTION

[0024] This part will describe the specific embodiments of the utility model in detail, and the preferred embodiments of the utility model are shown in the drawings, and the drawings are used to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0025] Please refer to Figures 1-5The utility model provides a technical scheme: a ball screw pre -tightening force adjusting device, including screw body 1, the surface of screw body 1 is provided with first nut 2 and second nut 9, and the surface structure of first nut 2 and second nut 9 is same, and the surface of first nut 2 is fixedly connected with connecting rod 6, and the one end of connecting rod 6 away from first nut 2 is fixedly connected with fixed block 7, and the surface of fixed block 7 is inclinedly arranged, and the surface of first nut 2 and second nut 9 is provided with sleeve pipe 3, and the inside of sleeve pipe 3 is provided with recess 16, and the inner wall of recess 16 is slidably connected with sliding block 12, and sliding block 12 is arranged in trapezoidal, and the surface of sliding block 12 can be better contacted with fixed block 7 by the trapezoidal arrangement of sliding block 12, so as to push fixed block 7, and the surface of sleeve pipe 3 is screw connected with rotating sleeve 4, and the inside of rotating sleeve 4 is fixedly connected with fixed shell 10, and the inside of sleeve pipe 3 is slidably connected with sliding rod 11, and sliding rod 11 penetrates to the inside of fixed shell 10, and the inner wall of fixed shell 10 is slidably connected with the surface of sliding rod 11.

[0026] The inside of fixed shell 10 is provided with limiting groove 17, and limiting groove 17 is arranged in inclined, and the inside of sliding rod 11 is slidably connected with limiting rod 13, and the surface of limiting rod 13 is slidably connected with the inner wall of limiting groove 17, and the limiting rod 13 is arranged, so that when rotating sleeve 4 rotates, rotating sleeve 4 drives fixed shell 10 to rotate, so that fixed shell 10 rotates, so that limiting groove 17 drives limiting rod 13 to move, and rotating sleeve 4 moves on the surface of sleeve pipe 3 when rotating, so that rotating sleeve 4 drives limiting rod 13 to slide in the inside of sliding rod 11, so as to avoid that limiting rod 13 blocks the deviation of rotating sleeve 4.

[0027] The surface of fixed block 7 is embedded with first ball 8, and the first ball 8 is arranged, and the first ball 8 contacts sliding block 12 when sliding block 12 moves, so as to reduce the friction between fixed block 7 and sliding block 12, so as to reduce the abrasion of the device, and the both ends of limiting rod 13 are fixedly connected with second ball 14, and the second ball 14 is arranged, and the both ends of limiting rod 13 are arranged in the inside of limiting groove 17, so that the second ball 14 on limiting rod 13 contacts limiting groove 17 when limiting groove 17 moves, so as to reduce the friction between limiting rod 13 and limiting groove 17, so as to increase the service life of the device.

[0028] The surface of sliding block 12 is provided with sliding groove 15, and sliding groove 15 corresponds with fixed block 7, so as to limit fixed block 7 by the arrangement of sliding groove 15, and further limit first nut 2 and second nut 9.

[0029] The surface of rotating sleeve 4 is fixedly connected with antiskid line 5, and antiskid line 5 is made of rubber material, and the rotating sleeve 4 is rotated by the arrangement of antiskid line 5.

[0030] Working principle: when the position of the sliding block 12 needs to be adjusted, the worker rotates the rotating sleeve 4, the rotating sleeve 4 drives the fixed shell 10 to move, the fixed shell 10 moves to extrude the limiting rod 13 in the limiting groove 17, so that the limiting rod 13 slides with the rotating sleeve 4, and the limiting rod 13 drives the sliding rod 11 to move, the sliding rod 11 moves to push the sliding block 12, so that the sliding block 12 moves to push the fixed block 7 inserted in the sliding groove 15, thereby controlling the distance between the first nut 2 and the second nut 9 through the movement of the sliding block 12, so that the distance between the first nut 2 and the second nut 9 is controlled by rotating the rotating sleeve 4, so as to facilitate the worker to control the adjustment of the pre-tightening force, and facilitate the worker to use.

[0031] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A ball screw preload adjustment device, comprising a screw body (1), characterized in that: The surface of the lead screw body (1) is provided with a first nut (2) and a second nut (9). A connecting rod (6) is fixedly connected to the surface of the first nut (2). A fixing block (7) is fixedly connected to the end of the connecting rod (6) away from the first nut (2). A sleeve (3) is provided on the surface of the first nut (2) and the second nut (9). A groove (16) is opened inside the sleeve (3). A rotating sleeve (4) is threadedly connected to the surface of the sleeve (3). A fixing shell (10) is fixedly connected inside the rotating sleeve (4). A sliding rod (11) is slidably connected inside the sleeve (3). The sliding rod (11) penetrates into the inside of the fixing shell (10). The inner wall of the fixing shell (10) is slidably connected to the surface of the sliding rod (11).

2. The ball screw preload adjustment device according to claim 1, characterized in that: The first nut (2) and the second nut (9) have the same surface structure, and the surface of the fixing block (7) is inclined.

3. The ball screw preload adjustment device according to claim 2, characterized in that: The inner wall of the groove (16) is slidably connected to a sliding block (12), which is trapezoidally arranged.

4. The ball screw preload adjustment device according to claim 3, characterized in that: The fixed shell (10) has a limiting groove (17) inside, and the limiting groove (17) is inclined.

5. The ball screw preload adjustment device according to claim 4, characterized in that: The sliding rod (11) is slidably connected to a limiting rod (13), and the surface of the limiting rod (13) is slidably connected to the inner wall of the limiting groove (17).

6. The ball screw preload adjustment device according to claim 5, characterized in that: The surface of the fixing block (7) is inlaid with a first ball (8), and the two ends of the limiting rod (13) are fixedly connected with a second ball (14).

7. The ball screw preload adjustment device according to claim 6, characterized in that: The surface of the sliding block (12) is provided with a groove (15), which corresponds to the fixed block (7).

8. The ball screw preload adjustment device according to claim 7, characterized in that: The surface of the rotating sleeve (4) is fixedly connected with anti-slip texture (5), which is made of rubber.

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