A self-positioning tool for shaft parts for CNC lathes

Abstract

The utility model discloses a self-positioning tool for shaft parts for CNC lathes, comprising a shell, an electric push rod fixedly installed on one side of the shell, the electric push rod fixedly connected to an output shaft through an output end on one side, a rack fixedly installed on one end of the output shaft, a bidirectional screw rod arranged on one side of the shell corresponding to the front end of the rack, a gear fixedly installed on the center of the surface of the bidirectional screw rod, and the rear of the gear meshingly connected with the front surface of the rack. The self-positioning tool for shaft parts for CNC lathes controls the electric push rod to rotate the rack meshing gear through the mutual cooperation of the electric push rod, the rack, the bidirectional screw rod, the moving sleeve, the connecting plate, the gear, the rectangular plate and the positioning clamp, so that the two moving sleeves respectively drive the two connecting plates to move relative to each other with the rotation of the gear, and then the shaft parts can be quickly and conveniently positioned through the positioning clamp, avoiding the traditional positioning method and increasing the labor burden on the operator.

Description

Technical Field

[0001] The utility model relates to the technical field of self-positioning tooling for shaft parts, in particular to a self-positioning tooling for shaft parts used in numerically controlled lathes. Background Art

[0002] CNC lathe shaft parts refer to shaft parts used for CNC lathe processing, usually including shafts, bushings, journals and other parts with rotation characteristics. The processing process of shaft parts on CNC lathes usually includes clamping, cutting, precision control and surface treatment. In the process of clamping shaft parts, positioning tooling is used to ensure the stability and precision of the parts.

[0003] The existing positioning fixtures for shaft parts for CNC lathes mostly use manual operation to screw multiple bolts to position shaft parts, which takes a lot of time and energy. During the operation, tools such as wrenches are needed to tighten or loosen the screws one by one. The process is cumbersome and not conducive to improving production efficiency. At the same time, during the processing of CNC lathes, shaft parts need to withstand the cutting force of the tool and the centrifugal stress generated by high-speed rotation. Due to the lack of shock-absorbing structure, these stresses may cause vibration of shaft parts, thereby affecting the processing accuracy. Vibration will cause processing errors and may even cause damage to the workpiece. Therefore, we propose a self-positioning fixture for shaft parts for CNC lathes. Utility Model Content

[0004] The purpose of the utility model is to provide a self-positioning tool for shaft parts for CNC lathes to solve the problem that the existing positioning tool for shaft parts for CNC lathes proposed in the above background technology is that when positioning shaft parts, most of them adopt manual operation to screw multiple bolts to position the shaft parts, which requires a lot of time and energy. During the operation, tools such as wrenches need to be used to tighten or loosen the screws one by one. The process is cumbersome and not conducive to improving production efficiency. At the same time, during the processing of CNC lathes, shaft parts need to withstand the cutting force of the tool and the centrifugal stress generated by high-speed rotation. Due to the lack of shock-absorbing structure, these stresses may cause vibration of the shaft parts, thereby affecting the processing accuracy. Vibration will cause processing errors and may even cause damage to the workpiece.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-positioning tooling for shaft parts of a CNC lathe, comprising a shell, an electric push rod is fixedly installed on one side of the shell, the electric push rod is fixedly connected to an output shaft through an output end of one side thereof, a rack is fixedly installed on one end of the output shaft, a bidirectional screw rod is arranged on a side of the shell corresponding to the front end of the rack, a gear is fixedly installed on the center of the surface of the bidirectional screw rod, the rear part of the gear is meshed with the front surface of the rack, a movable sleeve is arranged on the top and bottom of the surface of the bidirectional screw rod, a connecting plate is fixedly connected to the center of one side of the two movable sleeves, a groove is provided on the top and bottom of one side of the outer wall of the shell, one end of the two connecting plates respectively penetrates into the two grooves and extends to the outside of the shell, a rectangular plate is fixedly connected to one side of the two connecting plates, the two rectangular plates are symmetrically arranged up and down, three elastic rubber pads are fixedly installed on the bottom of the rectangular plate, and a positioning clamp is fixedly installed on the lower end of the three elastic rubber pads.

[0006] Compared with the prior art, the beneficial effects of the utility model are:

[0007] The self-positioning tooling for shaft parts of CNC lathes controls the electric push rod to rotate the rack meshing gear through the cooperation of the electric push rod, rack, bidirectional lead screw, movable sleeve, connecting plate, gear, rectangular plate and positioning clamp block, so that the two movable sleeves respectively drive the two connecting plates to move relative to each other as the gear rotates, and then the shaft parts can be positioned quickly and conveniently through the positioning clamp block, avoiding the traditional positioning method which increases the labor burden on the operator and improving the practicality of the self-positioning tooling. The design of the elastic rubber pad can provide a certain elasticity and buffering effect, reduce the error and vibration of the shaft parts during the positioning process, absorb and buffer the vibration energy during the processing process, reduce the vibration of the shaft parts, which helps to increase the life of the tool, reduce processing interruptions and downtime, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 This is a structural stereogram of the clamping mechanism of the utility model;

[0010] Figure 3 This is the front view of the structure of the utility model;

[0011] Figure 4 It is a three-dimensional diagram of the rear structure of the rack of the utility model.

[0012] In the figure: 1. housing; 2. electric push rod; 3. output shaft; 4. rack; 5. bidirectional screw; 6. movable sleeve; 7. bearing; 8. connecting plate; 9. slide rail; 10. slider; 11. slide rod; 12. gear; 13. rectangular plate; 14. elastic rubber pad; 15. positioning clamp; 16. rubber plate; 17. mounting plate. DETAILED DESCRIPTION

[0013] 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.

[0014] See also Figure 1-4 The utility model provides a technical solution: a self-positioning tooling for shaft parts of a CNC lathe, comprising a shell 1, an electric push rod 2 is fixedly installed on one side of the shell 1, and the electric push rod 2 is fixedly connected to an output shaft 3 through an output end of one side thereof, and a rack 4 is fixedly installed on one end of the output shaft 3. A bidirectional lead screw 5 is arranged on one side of the shell 1 corresponding to the front end of the rack 4, and a gear 12 is fixedly installed on the center of the surface of the bidirectional lead screw 5. The rear part of the gear 12 is meshed with the front surface of the rack 4, and a moving sleeve 6 is arranged on the top and bottom of the surface of the bidirectional lead screw 5. A connecting plate 8 is fixedly connected to the center of one side of the two moving sleeves 6. A groove is provided on the top and bottom of one side of the outer wall of the shell 1, and one end of the two connecting plates 8 respectively penetrates into the two grooves and extends to the outside of the shell 1. A rectangular plate 13 is fixedly connected to one side of the two connecting plates 8. The two rectangular plates 13 are symmetrically arranged up and down, and three elastic rubber pads 14 are fixedly installed on the bottom of the rectangular plate 13, and a positioning clamp 15 is fixedly installed on the lower end of the three elastic rubber pads 14.

[0015] The top and bottom of the bidirectional screw rod 5 are movably connected to bearings 7 fixedly installed at the top and bottom of the housing 1 respectively, so as to provide rotational support for the bidirectional screw rod 5 .

[0016] The bidirectional screw rod 5 is threadedly connected to the positive thread groove and the negative thread groove on the inner wall of the two movable sleeves 6 through the positive thread teeth and the negative thread teeth on the top and bottom of its surface. During the rotation process, the bidirectional screw rod 5 can simultaneously drive the two movable sleeves 6 to move relative to or away from each other.

[0017] A slide bar 11 is provided on one side of the shell 1. The upper and lower ends of the slide bar 11 respectively penetrate the outside of the two connecting plates 8 and are fixedly connected to the inner wall of the shell 1, thereby guiding the connecting plates 8 during movement and improving the stability of the connecting plates 8.

[0018] The two positioning clamps 15 are of an arc-shaped structure that is symmetrical up and down. Rubber plates 16 are fixedly installed at the upper and lower ends of the two positioning clamps 15. The rubber plates 16 can prevent the shaft parts from being worn when clamping and positioning, and at the same time increase the friction between the shaft parts to prevent the shaft parts from moving.

[0019] One end of the housing 1 is fixedly connected to a mounting plate 17 , and mounting holes are provided at four corners of one side of the mounting plate 17 to facilitate installation of the self-positioning fixture on a lathe.

[0020] A slider 10 is fixedly connected to the rear surface of the rack 4, and a slide rail 9 is fixedly installed at the center of the rear surface of the inner wall of the shell 1. The rear end of the slider 10 penetrates into the interior of the slide rail 9 and is slidably connected to the inner wall of the slide rail 9, which supports and limits the rack 4 when it moves.

[0021] Working principle: During operation, first fix the housing 1 on the lathe through the mounting plate 17. When the shaft parts need to be positioned, control the electric push rod 2 to drive the rack 4 to push to one side. During the movement of the rack 4, the gear 12 is engaged and the bidirectional lead screw 5 is rotated. At this time, the two movable sleeves 6 respectively drive the connecting plates 8 on one side to move relative to the rotation of the bidirectional lead screw 5. The two connecting plates 8 respectively drive the positioning clamps 15 to move through the rectangular plates 13. The clamping and positioning of the shaft parts are completed by the relative movement of the two positioning clamps 15.

[0022] To sum up: the self-positioning tooling for shaft parts of the CNC lathe, through the mutual cooperation of the electric push rod 2, rack 4, bidirectional screw 5, movable sleeve 6, connecting plate 8, gear 12, rectangular plate 13 and positioning clamp 15, controls the electric push rod 2 to make the rack 4 engage the gear 12 to rotate, so that the two movable sleeves 6 respectively drive the two connecting plates 8 to move relative to each other with the rotation of the gear 12, and then the shaft parts can be quickly and conveniently positioned through the positioning clamp 15, avoiding the traditional positioning method that increases the labor burden for the operator, and improving the practicality of the self-positioning tooling, the design of the elastic rubber pad 14, the elastic rubber pad 14 can provide a certain elasticity and buffering effect, reduce the error and vibration of the shaft parts during the positioning process, the elastic rubber pad 14 absorbs and buffers the vibration energy during the processing process, and reduces the vibration of the shaft parts, which helps to increase the life of the tool, reduce processing interruptions and downtime, and improve production efficiency.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-positioning tool for shaft parts for a CNC lathe, comprising a housing (1), characterized in that: An electric push rod (2) is fixedly mounted on one side of the housing (1); the electric push rod (2) is fixedly connected to an output shaft (3) through an output end on one side thereof; a rack (4) is fixedly mounted on one end of the output shaft (3); a bidirectional screw rod (5) is arranged on one side of the housing (1) corresponding to the front end of the rack (4); a gear (12) is fixedly mounted at the center of the surface of the bidirectional screw rod (5); the rear portion of the gear (12) is meshedly connected to the front surface of the rack (4); and movable sleeves are arranged on the top and bottom of the surface of the bidirectional screw rod (5). (6), a connecting plate (8) is fixedly connected to the center of one side of the two moving sleeves (6), a groove is opened at the top and bottom of one side of the outer wall of the shell (1), one end of the two connecting plates (8) respectively penetrates the two grooves and extends to the outside of the shell (1), one side of the two connecting plates (8) is fixedly connected to a rectangular plate (13), the two rectangular plates (13) are symmetrically arranged up and down, three elastic rubber pads (14) are fixedly installed at the bottom of the rectangular plate (13), and a positioning clamp (15) is fixedly installed at the lower end of the three elastic rubber pads (14).

2. The self-positioning tool for shaft parts for CNC lathes according to claim 1, characterized in that: The top and bottom of the bidirectional screw rod (5) are movably connected to bearings (7) fixedly installed at the top and bottom of the housing (1), respectively.

3. The self-positioning tool for shaft parts for CNC lathes according to claim 1, characterized in that: The bidirectional screw rod (5) is threadably connected to the positive thread grooves and negative thread grooves provided on the inner walls of the two movable sleeves (6) respectively through the positive thread teeth and negative thread teeth provided on the top and bottom of the surface of the bidirectional screw rod (5).

4. The self-positioning tool for shaft parts for CNC lathes according to claim 1, characterized in that: A sliding rod (11) is provided on one side of the housing (1), and the upper end and the lower end of the sliding rod (11) respectively penetrate the outside of the two connecting plates (8) and are fixedly connected to the inner wall of the housing (1).

5. The self-positioning tool for shaft parts for CNC lathes according to claim 1, characterized in that: The two positioning clamps (15) are of an arc-shaped structure that is symmetrical in the upper and lower directions. Rubber plates (16) are fixedly mounted on the upper and lower ends of the two positioning clamps (15).

6. The self-positioning tool for shaft parts for CNC lathes according to claim 1, characterized in that: One end of the housing (1) is fixedly connected to a mounting plate (17), and mounting holes are provided at four corners of one side of the mounting plate (17).

7. The self-positioning tool for shaft parts for CNC lathes according to claim 1, characterized in that: A slider (10) is fixedly connected to the rear surface of the rack (4), a slide rail (9) is fixedly installed at the center of the rear surface of the inner wall of the housing (1), and the rear end of the slider (10) penetrates into the interior of the slide rail (9) and is slidably connected to the inner wall of the slide rail (9).

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