Ball screw nut detection device

Abstract

A ball screw nut detection device is characterized in that the ball screw nut detection device comprises an operation table, the upper end face of the operation table is provided with a big-end-down taper lead screw in a rotating structure mode, the operation table is connected with a positioning block in a sliding structure mode, the positioning block enables a nut to do reciprocating motion in the axial direction of the taper lead screw, and the taper lead screw penetrates through the nut during reciprocating motion; the positioning block is connected with a distance measuring device, and the distance measuring device is used for measuring and displaying the moving distance of the nut; the power piece is used for enabling the taper lead screw to rotate; whether the grinding size of the nut meets the standard or not can be known by comparing the display moving distance of the magnetic grid digital display meter with the preset distance, so that the nut which does not meet the standard can be detected, and the yield is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the nut machining technical field, in particular to a ball screw nut detection device. BACKGROUND

[0002] In the modern mechanical manufacturing field, a ball screw pair is the most precise and most commonly used transmission device in a transmission machine, and is therefore widely used in high-precision equipment such as numerical control machine tools, precision instruments, industrial robots and aerospace equipment. The ball screw pair can convert rotary motion into linear motion. Under the rotation of the screw rod, the nut moves along the screw rod reciprocally. When the diameter and lead of the screw rod are given, and the fixed torque driving the screw rod to rotate is set, the distance of the nut moving along the screw rod can be determined.

[0003] In the assembly process of the ball screw and the nut, steel balls need to be filled, and before the batch assembly of the nut, the diameter of the steel ball matched with the nut needs to be detected. If the diameter of the steel ball does not match the nut, the gap between the screw rod and the nut will not be suitable, the transmission precision will be reduced, the transmission efficiency will be reduced, and the service life of the device will be affected. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a ball screw nut detection device, and the technical problems solved are: detecting whether the diameter of the steel ball filled in the nut is suitable. To solve the above technical problems, the utility model adopts the technical scheme that:

[0005] A ball screw nut detection device comprises:

[0006] An operation table;

[0007] A taper screw rod with a large lower end and a small upper end, which is arranged on the upper end surface of the operation table in a rotating structure mode;

[0008] A positioning block for fixing the nut, which is connected to the operation table in a sliding structure mode;

[0009] A distance measuring device, which is connected to the positioning block and is used for measuring and displaying the moving distance of the nut;

[0010] A power member for rotating the taper screw rod.

[0011] Further, the positioning block is provided with a through hole for mounting the nut.

[0012] Further, the upper end surface of the operation table is vertically provided with a linear guide rail, and the sliding block of the linear guide rail is connected to the positioning block in a fixed structure mode.

[0013] Further, the upper end surface of the linear guide rail is provided with a magnet for attracting the positioning block in a fixed structure mode.

[0014] Further, the distance measuring device is a magnetic grating digital display meter, and the reading head of the magnetic grating digital display meter is connected to the positioning block in a fixed structure mode.

[0015] Further, the power member is a servo motor, and the output end of the servo motor is connected to the taper screw.

[0016] Further, the output end of the servo motor is sleeved with a torque sensor in a rotating structure mode, the torque sensor is electrically connected with a PLC controller, and the PLC controller is electrically connected with a display.

[0017] The PLC controller is electrically connected with the servo motor.

[0018] The beneficial effects of the utility model are as follows: the diameter and lead of the screw rod to be assembled and the torque applied to the taper screw rod can be used to determine the preset distance of the nut moving along the taper screw rod, after the steel balls are filled, the taper screw rod starts to rotate, at this time, the nut moves downward along the taper screw rod, the distance of the nut moving along the taper screw rod is the same as the preset distance when the steel balls with appropriate diameters are filled, and since the taper screw rod is conical, the moving distance of the nut with inappropriate steel balls is smaller or larger than the preset distance, therefore, by comparing the moving distance displayed by the magnetic grating digital display meter with the preset distance, it can be known whether the diameter of the filled steel balls meets the standard, so that appropriate steel balls can be replaced in time, and the product quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a three-dimensional structure schematic diagram of the utility model.

[0020] Figure 2 is a local explosion structure schematic diagram of the utility model.

[0021] In the drawings:

[0022] 1, operation table, 2, taper screw, 3, positioning block, 4, through hole, 5, linear guide rail, 6, magnetic grating digital display meter, 7, reading head, 8, magnet, 9, PLC controller, 10, torque sensor, 11, display, 12, servo motor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be further described in detail with reference to the drawings and the following embodiments, so that the public can better master the implementation method of the utility model, and the specific implementation scheme of the utility model is as follows:

[0024] The utility model provides a ball screw nut detection device, its characterized in being including operation platform 1, the lower end of operation platform 1 is provided with the taper screw 2 of big in lower small in rotation structure mode, and operation platform 1 is connected with the positioning block 3 for fixing nut in sliding structure mode, and the positioning block 3 is connected with distance measuring device, and distance measuring device is used for measuring and showing the moving distance of nut, and the power part for making taper screw 2 rotate, through the device, whether the diameter of the steel ball of detection filling meets the standard, so as to replace the appropriate steel ball in time, ensure the product quality.

[0025] Specifically, the positioning block 3 is provided with a through hole 4 at the bottom for installing the nut; the flange of the nut faces downward and is in clearance fit with the inner wall of the positioning block 3; and when the nut descends with the rotation of the taper screw 2, the positioning block 3 descends under the action of gravity; and when the nut ascends with the rotation of the taper screw 2, the flange of the nut pushes against the positioning block 3 and pushes the positioning block 3 to ascend together with the nut.

[0026] It should be noted that the upper end of the operation platform 1 is vertically provided with a linear guide rail 5, and the sliding block of the linear guide rail 5 is fixedly connected with the positioning block 3.

[0027] Specifically, the upper end of the linear guide rail 5 is fixedly provided with a magnet 8 for attracting the positioning block 3; and when the positioning block 3 is located at the uppermost part of the linear guide rail 5, the magnet 8 is used to fix the position of the positioning block 3 to prevent the positioning block 3 from falling under the action of gravity when not in use.

[0028] It should be noted that the distance measuring device is a magnetic grating digital display meter 6, and the reading head 7 of the magnetic grating digital display meter 6 is fixedly connected with the positioning block 3; and through the setting of the magnetic grating digital display meter 6, the distance moved by the nut under the rotation of the taper screw 2 is determined.

[0029] It should be noted that the power part is a servo motor 12, and the output end of the servo motor 12 is connected with the taper screw 2.

[0030] Further, the output end of the servo motor 12 is rotatably sleeved with a torque sensor 10, the torque sensor 10 is electrically connected with a PLC controller 9, the PLC controller 9 is electrically connected with a display 11; the PLC controller 9 is electrically connected with the servo motor 12, the PLC controller 9 is used to control the torque of the taper screw 2, the servo motor 12 is controlled through the PLC controller 9, thereby controlling the size of the torque applied to the taper screw 2, and the size of the torque is displayed through the cooperation of the torque sensor 10, the PLC controller 9 and the display 11.

[0031] The working principle and working process of the utility model are as follows:

[0032] The preset distance of the nut moving along the taper screw is determined by the diameter and lead of the screw rod assembled with the nut, and the torque applied to the taper screw 2, then the nut flange is engaged with the taper screw 2 downwards, and the steel ball is put into the nut, then the positioning block 3 is separated from the magnet 8, the positioning block 3 is lowered to contact with the nut flange, then the magnetic grid digital display table 6 is opened, the setting torque is input through the PLC controller 9, so as to start the servo motor 12, the taper screw 2 starts to rotate, the nut moves downwards along the taper screw 2 with the rotation of the steel ball, when the nut stops moving downwards, the display data of the magnetic grid digital display table 6 is recorded, and the servo motor 12 is closed through the PLC controller 9; the steel ball is filled in the nut, the moving distance of the nut along the taper screw 2 is the same as the preset distance, and since the taper screw 2 is tapered, the moving distance of the nut with the inappropriate diameter of the steel ball is smaller or larger than the preset distance, and the diameter of the steel ball can be known by comparing the preset distance with the display moving distance of the magnetic grid digital display table 6.

[0033] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Although the utility model is described according to a limited number of embodiments, those skilled in the art should understand from the above description that other embodiments can be conceived within the scope of the utility model described herein.

Claims

1. A ball screw nut testing device, characterized in that, The utility model relates to a nut tightening device, which comprises: an operation table (1); a taper screw (2) with a large lower end and a small upper end, which is arranged on the upper end surface of the operation table (1) in a rotating structure; a positioning block (3) for fixing the nut, which is connected to the operation table (1) in a sliding structure; a distance measuring device, which is connected to the positioning block (3) and used for measuring and displaying the moving distance of the nut; a power element for rotating the taper screw (2).

2. The ball screw nut inspection apparatus according to claim 1, characterized by: The positioning block (3) is provided with a through hole (4) for installing the nut.

3. The ball screw nut inspection apparatus according to claim 2, characterized by: The operation table (1) is vertically provided with a linear guide rail (5) on the upper end surface, and the sliding block of the linear guide rail (5) is connected to the positioning block (3) in a fixed structure.

4. The ball screw nut inspection apparatus according to claim 3, characterized by: A magnet (8) for attracting the positioning block (3) is arranged on the upper end surface of the linear guide rail (5) in a fixed structure.

5. The ball screw nut inspection apparatus according to claim 2, characterized by: The distance measuring device is a magnetic grating digital display meter (6), and the reading head (7) of the magnetic grating digital display meter (6) is connected to the positioning block (3) in a fixed structure.

6. The ball screw nut inspection apparatus of claim 1, wherein: The power element is a servo motor (12), and the output end of the servo motor (12) is connected to the taper screw (2).

7. A ball screw nut inspection apparatus according to claim 6, wherein: The output end of the servo motor (12) is sleeved with a torque sensor (10) in a rotating structure, the torque sensor (10) is electrically connected with a PLC controller (9), and the PLC controller (9) is electrically connected with a display (11); The PLC controller (9) is electrically connected with the servo motor (12).

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