High-precision lead screw nut transmission moving device

Abstract

The utility model relates to the technical field of lead screw and nut transmission, and discloses a high-precision lead screw and nut transmission moving device which comprises a U-shaped frame, a motor, a lead screw and a nut installation base. Bearing bases are fixedly connected to the two sides of the upper surface of the U-shaped frame, and the lead screw is rotationally connected into the bearing bases; a nut mounting seat is in threaded transmission with the outer surface of the screw rod; and notches are formed in the two sides of the interior of the U-shaped frame, inner grooves are formed in the notches, connecting wing plates are arranged on the two sides of the nut mounting base, and the other ends of the connecting wing plates are slidably connected with the interiors of the notches. According to the high-precision lead screw nut transmission moving device, the smoothness of the nut mounting base during working can be guaranteed, meanwhile, instant stopping of the nut mounting base can be guaranteed, the situation that the nut mounting base moves within a small range due to the influence of inertia force is avoided, the high-precision positioning effect of the nut mounting base is improved, and the service life of the nut mounting base is prolonged. And the actual use effect of the lead screw nut is improved.

Description

Technical Field

[0001] This utility model relates to the field of lead screw and nut transmission technology, specifically a high-precision lead screw and nut transmission positioning device. Background Technology

[0002] A lead screw and nut drive positioning device is a mechanical transmission device mainly used to convert rotary motion into linear motion to achieve precise positioning and movement. It is usually composed of a lead screw, a nut, a support base, and a drive device. The lead screw is a threaded shaft, the nut is fitted onto the lead screw in conjunction with its threads, the support base supports the lead screw to ensure stable rotation, and the drive device (such as a motor) provides power to drive the lead screw to rotate.

[0003] In existing devices, to ensure that the nut can support the stable movement of the equipment, the lower surface of the nut is in close contact with the surface of the support base. This causes sliding friction between the nut and the support base, which can easily lead to wear over time. As a result, the nut can no longer stably support the equipment. In addition, after the nut moves, it will move slightly due to the inertial force of the transmission, making it impossible to accurately position it in the required location. This reduces the positioning accuracy of the nut and affects the operation of the equipment.

[0004] Therefore, it is necessary to propose a high-precision lead screw and nut transmission positioning device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-precision lead screw and nut transmission positioning device, which effectively improves the positioning accuracy of the nut while avoiding sliding friction between the nut and the support seat, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a high-precision lead screw and nut transmission positioning device, comprising a U-shaped frame, a motor, a lead screw, and a nut mounting base:

[0007] Both sides of the upper surface of the U-shaped frame are fixedly connected to a bearing seat, and a lead screw is rotatably connected inside the bearing seat. A nut mounting seat is threaded on the outer surface of the lead screw.

[0008] The U-shaped frame has slots on both sides, and each slot has an inner groove. The nut mounting base has connecting wing plates on both sides, with the other end of each wing plate slidably connected to the inside of the slot. A connecting block is fixedly connected to the lower surface of one end of the connecting wing plate inside the slot. The outer surface of the connecting block is slidably connected to the inside of the inner groove. An adsorption magnet is installed at the bottom of the inner groove, and a friction plate is fixedly connected to its upper surface. An electromagnet is installed at the top of the inside of the connecting block. Sliding grooves are formed on both sides of the inside of the connecting block, and a fixing block is installed at the top of each sliding groove. A connecting rod is fixedly connected to the lower surface of the fixing block, and a spring is sleeved on the outer surface of the connecting rod. A sliding block is slidably connected to the outer surface of the connecting rod. An adsorption magnet is installed on the lower surface of the sliding block, and a friction plate is fixedly connected to its lower surface.

[0009] Preferably, one end of the spring is fixedly connected to the lower surface of the fixed block, and the other end of the spring is fixedly connected to the upper surface of the sliding block.

[0010] Preferably, both sides of the end of the connecting wing plate that contacts the nut mounting seat are threaded with bolts, and the ends of the bolts are threaded to the inside of the side of the nut mounting seat.

[0011] Preferably, L-shaped support blocks are attached to the lower edges of both sides of the nut mounting base. Bolts are threaded inside the L-shaped support blocks, and the ends of the bolts are threaded to the sides of the nut mounting base. Slide rails are provided on both sides of the lower inner surface of the U-shaped frame. Rolling balls are limited and rolled on both sides of the other end of the L-shaped support blocks. The outer surface of the rolling balls is rolled in connection with the inside of the slide rail.

[0012] Preferably, a motor is mounted on the side of the U-shaped frame, and the motor is connected to the end of the lead screw via a coupling.

[0013] Preferably, an outer groove is provided on one side of the connecting block.

[0014] Preferably, the adsorption magnet one and the adsorption magnet two have opposite magnetic poles on opposite sides.

[0015] Preferably, the magnetic force of the electromagnet is greater than the magnetic force of the friction plate when energized.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This high-precision lead screw and nut transmission positioning device, by setting L-shaped support blocks and ball bearings, changes the static friction between the nut mounting seat and the bottom of the U-shaped frame to dynamic friction, making the movement of the nut mounting seat smoother. Simultaneously, the L-shaped support blocks are symmetrically arranged around the nut mounting seat, providing balanced support during use. When the nut mounting seat moves, the electromagnet is energized and generates magnetism. Since the sliding block lacks magnetic shielding, the magnetic force penetrates the sliding block and affects the second adsorption magnet, causing the second adsorption magnet to detach from the first adsorption magnet, ensuring the steady movement of the nut mounting seat. When the nut mounting seat stops moving, the motor stops working, and the synchronous electromagnet stops working, and the magnetic... When the magnetic attraction of magnet one disappears, magnet two moves towards magnet one until they are attracted. This causes the nut mounting seat to stop moving the instant the motor stops working. The cooperation of friction plates one and two increases the friction force, further enhancing the attraction effect. This allows the nut mounting seat to stop precisely at the required position. This structure ensures the smoothness of the nut mounting seat during operation and guarantees an instantaneous stop, preventing small-range movement of the nut mounting seat due to inertial forces. This improves the high-precision positioning effect of the nut mounting seat and enhances the actual performance of the lead screw nut. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the connecting wing plate and the L-shaped support block and the nut mounting seat of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the inner groove of this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. U-shaped frame; 110. Bearing seat; 120. Motor; 130. Lead screw; 140. Nut mounting seat; 150. Slide rail; 160. Groove; 170. Inner groove;

[0025] 2. Connecting wing plate; 210. Bolt 1;

[0026] 3. Adsorption magnet one; 310. Friction plate one; 320. Connecting block; 330. Electromagnet; 340. Slide groove; 350. Fixing block; 360. Connecting rod; 361. Spring; 370. Sliding block; 380. Adsorption magnet two; 381. Friction plate two; 390. Outer groove;

[0027] 4. L-shaped support block; 410. Ball bearing; 420. Two bolts. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 A high-precision lead screw and nut transmission positioning device includes a U-shaped frame 1, a motor 120, a lead screw 130, and a nut mounting base 140.

[0030] The upper surface of the U-shaped frame 1 is fixedly connected to both sides of the bearing seat 110. The bearing seat 110 is rotatably connected to the inside of the bearing seat 110. The outer surface of the bearing seat 130 is threaded with a nut mounting seat 140. The side of the U-shaped frame 1 is mounted with a motor 120. The motor 120 is connected to the end of the bearing seat 130 through a coupling.

[0031] Both sides of the U-shaped frame 1 have slots 160, and the slots 160 have inner grooves 170. Connecting wing plates 2 are provided on both sides of the nut mounting base 140. The other end of the connecting wing plate 2 is slidably connected to the inside of the slot 160. A connecting block 320 is fixedly connected to the lower surface of one end of the connecting wing plate 2 inside the slot 160. The outer surface of the connecting block 320 is slidably connected to the inside of the inner groove 170. An adsorption magnet 3 is installed at the bottom of the inner groove 170, and a friction plate 3 is fixedly connected to the upper surface of the adsorption magnet 3. 310. An electromagnet 330 is installed on the top of the inside of the connecting block 320. Slide grooves 340 are opened on both sides of the inside of the connecting block 320. A fixing block 350 is installed on the top of the inside of the slide groove 340. A connecting rod 360 is fixedly connected to the lower surface of the fixing block 350. A spring 361 is sleeved on the outer surface of the connecting rod 360. A sliding block 370 is slidably connected to the outer surface of the connecting rod 360. An adsorption magnet 380 is installed on the lower surface of the sliding block 370. A friction plate 381 is fixedly connected to the lower surface of the adsorption magnet 380.

[0032] When motor 120 is working, electromagnet 330 is synchronously energized. Electromagnet 330 generates magnetism. Since sliding block 370 lacks magnetic shielding, the magnetic force penetrates it and affects magnet 380, causing magnet 380 to detach from magnet 3, ensuring the steady movement of nut mounting base 140. When nut mounting base 140 stops moving, motor 120 stops working, and electromagnet 330 stops working, losing its magnetism. Through the magnetic influence of magnet 3, magnet 380 moves towards magnet 3 until they attract each other. Nut mounting base 140 stops moving the instant motor 120 stops. The cooperation of friction plate 310 and friction plate 381 increases friction, further strengthening the attraction effect, allowing nut mounting base 140 to stop precisely at the desired position.

[0033] As a preferred technical solution of this utility model, one end of the spring 361 is fixedly connected to the lower surface of the fixed block 350, and the other end of the spring 361 is fixedly connected to the upper surface of the sliding block 370.

[0034] The use of spring 361 in conjunction with connecting rod 360 ensures that sliding block 370 can move stably up and down.

[0035] As a preferred technical solution of this utility model, both sides of the end of the connecting wing plate 2 that contacts the nut mounting seat 140 are threaded with bolts 210, and the ends of bolts 210 are threaded to the inside of the side of the nut mounting seat 140.

[0036] The bolted connection allows the connecting wing plate 2 and the nut mounting base 140 to be assembled, facilitating disassembly and assembly.

[0037] As a preferred technical solution of this utility model, L-shaped support blocks 4 are attached to the lower edges of both sides of the nut mounting base 140. Bolts 420 are threadedly connected to the inside of the L-shaped support blocks 4, and the ends of the bolts 420 are threadedly connected to the sides of the nut mounting base 140. Slide rails 150 are provided on both sides of the lower inner surface of the U-shaped frame 1. Roller balls 410 are limited and rolled on both sides of the other end of the L-shaped support blocks 4. The outer surface of the roller balls 410 is rolledly connected to the inside of the slide rails 150.

[0038] When the motor 120 is working, it drives the nut mounting base 140 to move. At this time, the static friction between the nut mounting base 140 and the bottom of the U-shaped frame 1 is changed to dynamic friction, making the nut mounting base 140 move more smoothly. Meanwhile, the L-shaped support block 4 is symmetrically arranged with respect to the nut mounting base 140, which plays a role in balancing and supporting the nut mounting base 140 during use.

[0039] As a preferred technical solution of this utility model, an outer groove 390 is provided on one side of the connecting block 320.

[0040] The outer slot 390 is designed to facilitate the connection of the electromagnet 330 to an external power source via a wiring harness, so as to provide power that is converted into magnetic force.

[0041] As a preferred technical solution of this utility model, the adsorption magnet 3 and the adsorption magnet 380 are opposite magnetic poles on opposite sides, and the magnetic force of the electromagnet 330 is greater than that of the friction plate 310 when it is energized.

[0042] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision screw nut transmission walking device, comprising a U-shaped frame (1), a motor (120), a lead screw (130) and a nut mounting seat (140), characterized in that: the upper surface of the U-shaped frame (1) is fixedly connected with a bearing seat (110) on both sides, the inside of the bearing seat (110) is rotatably connected with the lead screw (130), and the outer surface of the lead screw (130) is threadedly driven by the nut mounting seat (140); both sides of the inside of the U-shaped frame (1) are provided with a notch (160), the inside of the notch (160) is provided with an inner groove (170), both sides of the nut mounting seat (140) are provided with a connecting wing plate (2), the other end of the connecting wing plate (2) is slidably connected with the inside of the notch (160), one end of the connecting wing plate (2) inside the notch (160) is fixedly connected with a connecting block (320) on the lower surface, the outer surface of the connecting block (320) is slidably connected with the inside of the inner groove (170), the inside of the inner groove (170) is provided with an adsorbing magnet (3), the upper surface of the adsorbing magnet (3) is fixedly connected with a friction plate (310), the inside of the connecting block (320) is provided with an electromagnet (330) on the top, both sides of the inside of the connecting block (320) are provided with a sliding groove (340), the inside of the sliding groove (340) is provided with a fixed block (350) on the top, the lower surface of the fixed block (350) is fixedly connected with a connecting rod (360), the outer surface of the connecting rod (360) is sleeved with a spring (361), the outer surface of the connecting rod (360) is slidably connected with a sliding block (370), the lower surface of the sliding block (370) is provided with an adsorbing magnet (380), and the lower surface of the adsorbing magnet (380) is fixedly connected with a friction plate (381).

2. The high-precision screw-nut transmission walking device according to claim 1, characterized in that: One end of the spring (361) is fixedly connected with the lower surface of the fixed block (350), and the other end of the spring (361) is fixedly connected with the upper surface of the sliding block (370).

3. The high-precision screw-nut transmission walking device according to claim 1, characterized in that: The end of the connecting wing plate (2) in contact with the nut mounting seat (140) is threadedly connected with a bolt (210) on both sides, and the end of the bolt (210) is threadedly connected with the inside of the side edge of the nut mounting seat (140).

4. The high-precision screw-nut transmission walking device according to claim 1, characterized in that: The lower end edges of both sides of the nut mounting seat (140) are fitted with an L-shaped support block (4), the inside of the L-shaped support block (4) is threadedly connected with a bolt (420), and the end of the bolt (420) is threadedly connected with the inside of the side edge of the nut mounting seat (140), both sides of the lower surface of the inside of the U-shaped frame (1) are provided with a sliding rail (150), the other end of the L-shaped support block (4) is rollingly limited with a ball (410) on both sides, and the outer surface of the ball (410) is rollingly connected with the inside of the sliding rail (150).

5. The high-precision screw-nut transmission walking device according to claim 1, characterized in that: The side surface of the U-shaped frame (1) is provided with a motor (120), and the motor (120) is connected with the end of the lead screw (130) through a shaft coupling.

6. The high-precision screw-nut transmission walking device according to claim 1, characterized in that: One side of the connecting block (320) is provided with an outer groove (390).

7. The high-precision screw drive walking device according to claim 1, characterized in that: The opposite side of the adsorbing magnet one (3) and the adsorbing magnet two (380) is a different direction magnetic pole.

8. The high-precision screw drive walking device according to claim 1, characterized in that: The magnetic force of the electromagnet (330) in the energized state is greater than the magnetic force of the friction plate one (310).

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