Machine tool lead screw

Abstract

The utility model discloses a machine tool lead screw which comprises a base and a machine tool body arranged on the base, a lead screw mechanism is arranged on the side, located on a spindle box, in the machine tool body, an installation table is arranged on the lead screw mechanism, and a protection plate assembly used for protecting the lead screw mechanism is further arranged between the machine tool body. The ball nut pre-cleaning device is simple in structure and reasonable in design, the effect of pre-cleaning the moving path when the ball nut moves on the lead screw body is achieved, it is ensured that machining scraps and dust cannot enter the attached portion of the ball nut and lead screw threads, the overall working abrasion of the lead screw is reduced, and the service life of the lead screw is prolonged. The service life of the machine tool lead screw is prolonged; and the machining precision and stability of the machine tool are improved. Meanwhile, no matter where the mounting table is located, the upper portion of the lead screw body is protected by the protection plate, heat dissipation of the lead screw body is not affected, the lead screw body is prevented from being damaged when workpieces or waste materials fall, protectiveness is further improved, and the service life of the lead screw is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool equipment, in particular to a machine tool lead screw. Background Art

[0002] As a key equipment for manufacturing precision parts, the accuracy and stability of machine tools have a decisive impact on product quality. Among the many components of machine tools, the lead screw, as an important transmission mechanism, converts the rotational motion of the spindle box into precise linear motion through its precise spiral structure, which is used to drive the horizontal movement of the workpiece or tool.

[0003] Deficiencies of existing technology:

[0004] The existing machine tool lead screw structure usually consists of two parts: a lead screw and a ball nut. The lead screw, as the transmission body, is driven to rotate by the spindle box. The spiral threads on its surface interact with the balls inside the ball nut to achieve linear motion of the ball nut and drive the tool or workpiece above it to move horizontally. However, during the machining process of the machine tool, the debris and dust generated by processes such as cutting and grinding will inevitably fall onto the lead screw, especially in the tooth groove area of ​​the lead screw. When the ball nut moves on the lead screw, these debris and dust can easily get stuck between the balls of the nut and the threads of the lead screw, causing the friction between the lead screw and the ball nut to increase, which in turn leads to increased wear of the lead screw, seriously affecting the service life of the lead screw. In addition, these debris and dust may also block the spiral structure of the lead screw, causing the ball nut to move unsmoothly, thereby affecting the machining accuracy and stability of the machine tool. Utility Model Content

[0005] The purpose of the utility model is to provide a machine tool lead screw to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a machine tool screw, comprising a base and a bed arranged on the base, a screw mechanism is arranged on one side of the spindle box in the bed, a mounting platform is arranged on the screw mechanism, and a guard plate assembly for protecting the screw mechanism is also arranged between the beds;

[0007] The screw mechanism comprises:

[0008] A lead screw body, the lead screw body is horizontally arranged on the inner side of the bed and connected to the spindle box, a ball nut is threadedly connected to the lead screw body, and the mounting platform is arranged above the ball nut;

[0009] A mounting ring, the mounting ring being arranged on both sides of the ball nut, a brush strip being arranged on the inner ring wall of the mounting ring, the brush strip being distributed in an annular shape on the inner side of the mounting ring, and the contour of the inner side of the brush strip matching the tooth groove on the lead screw body;

[0010] Cleaning sheets are arranged at both ends of the lead screw body and are used to clean debris on the brush strip.

[0011] Preferably, the guard plate assembly includes:

[0012] A cross bar, the cross bar is horizontally connected to the inner side of the bed and is located above the main body of the lead screw;

[0013] Fixed guard plates are respectively arranged on both sides of the inner wall of the bed and the two ends of the ball nut. Several dynamic guard plates are slidably connected between the fixed guard plates. The dynamic guard plates are slidably sleeved and connected up and down. The lower ends of the fixed guard plates and the dynamic guard plates are slidably connected to the cross bar by opening sliding holes.

[0014] Preferably, a slide groove is provided on the plate bodies of the fixed guard plate and the movable guard plate, and a sliding block matching the slide groove is also provided on one side of the fixed guard plate.

[0015] Preferably, the rotation diameter of the cleaning sheet is larger than the inner diameter of the brush bar and smaller than the outer diameter of the brush bar.

[0016] Preferably, the cleaning sheet is a fan blade, and the cleaning sheets at both ends of the lead screw body are installed in the same direction.

[0017] Preferably, the brush bar is made of wool.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The machine tool lead screw is provided with a lead screw mechanism, which includes a lead screw body, a ball nut, a mounting ring, a brush strip and a cleaning sheet, so that the ball nut can pre-clean the moving path when moving on the lead screw body, ensuring that processing debris and dust cannot enter the fitting part between the ball nut and the lead screw thread, reducing the overall working wear of the lead screw, improving the service life of the machine tool lead screw and the processing accuracy and stability of the machine tool, and the brush strip can also be self-cleaned by the cleaning sheet, thereby improving the convenience and practicality of the lead screw;

[0020] The machine tool lead screw is provided with a guard plate assembly, which includes a cross bar, a fixed guard plate and a movable guard plate. This ensures that no matter what position the mounting table is in, the top of the lead screw body is protected by the guard plate, and will not affect the heat dissipation of the lead screw body, thereby avoiding damage to the lead screw body when a workpiece or waste material falls, and further improving the protection and service life of the lead screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall front view of the utility model;

[0022] Figure 2 This is a schematic diagram of the main internal structure of the utility model;

[0023] Figure 3 It is a three-dimensional schematic diagram of the installation ring and brush strip of the utility model;

[0024] Figure 4 It is a side view connection diagram of the fixed guard plate and the dynamic guard plate of the utility model;

[0025] Figure 5 For the utility model Figure 1 A magnified schematic diagram at point A in FIG.

[0026] In the figure: 1. base; 2. bed; 3. screw mechanism; 301. screw body; 302. ball nut; 303. mounting ring; 304. brush strip; 305. cleaning sheet; 4. mounting table; 5. guard plate assembly; 501. cross bar; 502. fixed guard plate; 503. moving guard plate; 504. slide groove; 505. slider. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, it can be fixed connection, setting, or detachable connection, setting, or integrated connection, setting. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined. Example

[0031] See also Figure 1-5As shown, the utility model provides a technical solution for a machine tool screw: a machine tool screw, including a base 1 and a bed 2 installed on the base 1, a screw mechanism 3 is installed on one side of the spindle box in the bed 2, a mounting platform 4 is installed on the screw mechanism 3, and a guard plate assembly 5 for protecting the screw mechanism 3 is also installed between the bed 2. The screw mechanism 3 includes a screw body 301, a mounting ring 303 and a cleaning sheet 305. The screw body 301 is horizontally installed on the inner side of the bed 2 and connected to the spindle box, a ball nut 302 is threadedly connected to the screw body 301, and the mounting platform 4 is installed above the ball nut 302. The mounting ring 303 is fixedly mounted on both sides of the ball nut 302. A brush strip 304 is mounted on the inner ring wall of the mounting ring 303. The brush strip 304 is distributed in a ring shape on the inner side of the mounting ring 303. The inner profile of the brush strip 304 matches the tooth groove on the screw body 301, ensuring that the debris is either trapped in the brush strip 304 and fixed, or moves along the tooth groove under the push of the brush strip 304 as the screw body 301 rotates, and falls when it moves to the bottom of the tooth groove. Cleaning sheets 305 are mounted on both ends of the screw body 301 to clean the debris on the brush strip 304. When the machine tool needs to move the mounting table 4 horizontally during operation, the main spindle box drives the screw body 301 to rotate, and the ball nut 302 converts the rotational motion of the screw body 301 into horizontal motion, thereby driving the mounting table 4 to move. Since the brush strips 304 are arranged on both sides of the ball nut 302, and the inner side of the brush strips 304 is always attached to the tooth grooves of the screw body 301 at both ends of the ball nut 302 during the rotation of the screw body 301, the brush strips 304 can pre-brush away the dust and debris in the tooth grooves of the screw body 301 when the ball nut 302 moves horizontally, so as to ensure the cleanliness of the contact part between the screw body 301 and the ball nut 302. When it is necessary to clean the brush strips 304, the ball nut 302 is moved toward the top of the screw body 301. When the ball nut 302 is about to reach the top of the screw body 301, the cleaning sheet 305 will contact and scrape the brush strips 304, and the dust and debris on the brush strips 304 will fall off. Through the screw mechanism 3, the effect of pre-cleaning the moving path of the ball nut 302 when moving on the screw body 301 is achieved, ensuring that processing debris and dust cannot enter the fitting area between the ball nut 302 and the screw thread, reducing the overall working wear of the screw, and improving the service life of the machine tool screw and the processing accuracy and stability of the machine tool. In addition, the brush strip 304 can also be self-cleaned through the cleaning sheet 305, which also improves the convenience and practicality of the use of the screw.

[0032] The guard plate assembly 5 includes a crossbar 501 and a fixed guard plate 502. The crossbar 501 is horizontally connected to the inner side of the bed 2 and located above the lead screw body 301, and the crossbar 501 passes through the mounting platform 4. The fixed guard plates 502 are fixedly mounted on both sides of the inner wall of the bed 2 and both ends of the ball nut 302, respectively. A plurality of movable guard plates 503 are slidably connected between the fixed guard plates 502, and the movable guard plates 503 are slidably connected up and down. The lower ends of the fixed guard plates 502 and the movable guard plates 503 are slidably connected to the crossbar 501 by opening sliding holes. The plate bodies of the fixed guard plates 502 and the movable guard plates 503 are both provided with a slide groove 504, and a slider 505 matching the slide groove 504 is also provided on one side of the fixed guard plate 502. The fixed guard plates 502 and the movable guard plates 503 are both slidably connected to the slide groove 504 on the lower guard plate through the slider 505. When the ball nut 302 moves horizontally on the lead screw body 301, the fixed guard plates 502 on both sides of the ball nut 302 will pull out and push back the movable guard plates 503 below in sequence along the slide groove 504 and the cross bar 501. The guard plate assembly 5 ensures that the lead screw body 301 is protected by the guard plate above no matter where the mounting platform 4 is, and does not affect the heat dissipation of the lead screw body 301, thereby preventing the lead screw body 301 from being damaged by workpieces or waste materials when they fall, and further improving the protection and service life of the lead screw.

[0033] The rotation diameter of the cleaning sheet 305 is larger than the inner diameter of the brush strip 304 and smaller than the outer diameter of the brush strip 304 , ensuring that the cleaning sheet 305 can fully contact the brush strip 304 and will not collide with the mounting ring 303 when rotating.

[0034] The cleaning sheet 305 is a fan blade, and the cleaning sheets 305 at both ends of the screw body 301 are installed in the same direction. The fan blade can use the cleaning sheet 305 to generate airflow in a specified direction at both ends when the screw body 301 rotates, and by setting the installation direction, the direction of the airflow at both ends is consistent with the moving direction of the ball nut 302. When debris is scraped off the brush strip 304, the airflow can drive it to the outside of the ball nut 302.

[0035] The brush strip 304 is made of wool, and the brush strip 304 made of wool is soft and delicate, has an excellent cleaning effect, and will not cause damage to the lead screw body 301 .

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A machine tool lead screw, comprising a base (1) and a bed (2) arranged on the base (1), characterized in that: A screw mechanism (3) is arranged on one side of the spindle box in the bed (2), a mounting platform (4) is arranged on the screw mechanism (3), and a guard plate assembly (5) for protecting the screw mechanism (3) is also arranged between the bed (2); The screw mechanism (3) comprises: A lead screw body (301), the lead screw body (301) being horizontally arranged on the inner side of the bed (2) and connected to the spindle box, a ball nut (302) being threadedly connected to the lead screw body (301), and the mounting platform (4) being arranged above the ball nut (302); A mounting ring (303), the mounting ring (303) being arranged on both sides of the ball nut (302), a brush strip (304) being arranged on the inner ring wall of the mounting ring (303), the brush strip (304) being distributed in an annular shape on the inner side of the mounting ring (303), the inner side profile of the brush strip (304) matching the tooth groove on the lead screw body (301); Cleaning sheets (305), the cleaning sheets (305) being arranged at both ends of the lead screw body (301) and used for cleaning debris on the brush strip (304).

2. The machine tool lead screw according to claim 1, characterized in that: The guard plate assembly (5) comprises: A crossbar (501), the crossbar (501) being horizontally connected to the inner side of the bed (2) and located above the lead screw body (301); Fixed guard plates (502) are respectively arranged on both sides of the inner wall of the bed (2) and at both ends of the ball nut (302); a plurality of movable guard plates (503) are slidably connected between the fixed guard plates (502); the movable guard plates (503) are slidably sleeved and connected up and down; the lower ends of the fixed guard plates (502) and the movable guard plates (503) are slidably connected to the crossbar (501) by opening sliding holes.

3. The machine tool lead screw according to claim 2, characterized in that: The fixed guard plate (502) and the movable guard plate (503) are both provided with a slide groove (504) on their plate bodies, and a sliding block (505) matching the slide groove (504) is also provided on one side of the fixed guard plate (502).

4. The machine tool lead screw according to claim 1, characterized in that: The rotation diameter of the cleaning sheet (305) is larger than the inner diameter of the brush bar (304) and smaller than the outer diameter of the brush bar (304).

5. The machine tool lead screw according to claim 1, characterized in that: The cleaning sheet (305) is a fan blade, and the cleaning sheets (305) at both ends of the lead screw body (301) are installed in the same direction.

6. The machine tool lead screw according to claim 1, characterized in that: The brush strip (304) is made of wool.

Images