Ball screw pair running-in equipment

Abstract

The ball screw pair running-in equipment comprises an operation table, a servo motor is arranged on the upper end face of the operation table, and a clamping device is arranged at the output end of the servo motor; a load block is slidably arranged on the upper end face of the operation table, a positioning piece capable of being inserted into the lead screw is fixedly arranged on the side, facing the servo motor, of the load block, a fixing pin is arranged on the positioning piece in a pluggable mode, and inductive switches are arranged on the outer side of the load block, connected with the upper end face of the operation table in a sliding mode and electrically connected with a controller. The controller is electrically connected with the servo motor; through running-in of the lead screw, the roughness and the abrasion rate of the surface of the lead screw are reduced, the lead screw is not prone to being damaged under the long-term cyclic load effect, and the service life of the lead screw is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing devices, in particular to a ball screw pair running-in device. BACKGROUND

[0002] Ball screw pairs can convert rotary motion into linear motion. With the increasing accuracy of servo control, screw pairs are gradually developing towards miniaturization and microminiaturization. Today, micro screw pairs can be applied to transmission components of robot joints, and the connection holes at the ends of the screws are connected to the robot finger joints, making the overall structure more compact and lightweight, and improving the flexibility of the joints.

[0003] In addition, since the movement of the robot joint is usually periodic, the screw will repeatedly bear alternating loads during the periodic motion, which is prone to fatigue cracks. Therefore, the screw pair must be preloaded and run-in before use. However, the existing running-in devices can only run-in one type of screw, which is difficult to meet the actual production needs. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the ball screw pair running-in device is provided, and the technical problem solved is that the existing running-in devices can only run-in one type of screw, which is difficult to meet the actual production needs. To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] The ball screw pair running-in device comprises:

[0006] An operation table;

[0007] A servo motor for driving the nut to rotate, the servo motor being arranged on the upper end surface of the operation table in a fixed structure, and the output end of the servo motor being provided with a clamping device for clamping the nut;

[0008] A load block, the load block being arranged on the upper end surface of the operation table in a sliding structure;

[0009] A positioning piece that can be inserted into the screw, the positioning piece being arranged on the side of the load block facing the servo motor in a fixed structure;

[0010] A fixing pin, the fixing pin being connected to the positioning piece in a pluggable structure;

[0011] Two inductive switches located at the outer sides of the two ends of the load block, the two inductive switches being arranged on the upper end surface of the operation table in a sliding structure;

[0012] A controller, the controller being electrically connected to the servo motor and the inductive switches.

[0013] Further, a linear guide rail is arranged between the servo motor and the load block in a fixed structure, and the load block is connected to the sliding block of the linear guide rail in a fixed structure.

[0014] Further, the inductive switch is provided below with a sliding groove, and the sliding groove is connected with the operation table in a fixed structure mode.

[0015] The bottom of the inductive switch is provided with a sliding block matched with the sliding groove in a fixed structure mode, and the inductive switch is connected with a bolt through thread engagement on one side.

[0016] Further, the load block is provided with an inductive block on the outside of both ends in a fixed structure mode.

[0017] Further, the controller is a PLC controller.

[0018] Further, the clamping device comprises a chuck, the chuck is connected with the output end of the servo motor through thread engagement, and a collet is clamped in the chuck.

[0019] The beneficial effects of the utility model are: through the setting of the inductive switch, the positioning piece, the fixing pin and the clamping device, different length lead screws can be fixed, the distance between the inductive switches is adjusted, the distance between the load block and the servo motor is changed, and then the device is suitable for testing lead screws of different lengths, and the practicability of the device is improved. DRAWINGS:

[0020] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0021] Figure 2 It is the explosion structure schematic diagram of the utility model when the lead screw is inserted into the positioning piece.

[0022] Figure 3 It is the explosion structure schematic diagram of part of the structure of the utility model.

[0023] In the drawings:

[0024] 1, operation table, 2, load block, 3, positioning piece, 4, fixing pin, 5, inductive switch, 6, PLC controller, 7, linear guide rail, 8, bolt, 9, sliding groove, 10, inductive block, 11, sliding block, 12, servo motor, 13, collet, 14, chuck. CONCRETE IMPLEMENTATION METHOD:

[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer, now the utility model will be further described in detail with reference to the drawings and the following examples, so that the public can better master the implementation method of the utility model, and the specific implementation scheme of the utility model is:

[0026] The ball screw pair running-in device, including the operation platform 1, the upper end face of the operation platform 1 is provided with the servo motor 12 rotating the driving nut in a fixed structure, the output end of the servo motor 12 is provided with the clamping device for clamping the nut;The upper end face of the operation platform 1 is provided with the load block 2 in a sliding structure, the side of the load block 2 towards the servo motor 12 is provided with the positioning piece 3 that can be inserted into the screw in a fixed structure, the fixed pin 4 is provided in the pluggable structure on the positioning piece 3, when the screw is inserted into the positioning piece 3, the fixed pin 4 is inserted into the positioning piece 3 and passes through the connecting hole of the screw end, the screw is fixed;The two ends of the outer side of the load block 2 are provided with the inductive switch 5, the two inductive switches 5 are connected with the upper end face of the operation platform 1 in a sliding structure, the inductive switch 5 is controlled by the electric connection controller, the controller is controlled by the electric connection servo motor 12;Through the running-in of the screw, the roughness and the wear rate of the screw surface are reduced, the screw is less likely to be damaged under the long-term cyclic load, and the service life of the screw is improved.

[0027] It should be noted that the servo motor 12 and the load block 2 are provided with a linear guide rail 7 in a fixed structure, and the slider of the load block 2 and the linear guide rail 7 is connected in a fixed structure;Through the setting of the linear guide rail 7, the load block 2 can reciprocate towards the servo motor 12.

[0028] It should be noted that the inductive switch 5 is provided below the sliding groove 9, and the sliding groove 9 is connected with the operation platform 1 in a fixed structure;The inductive switch 5 is provided with a sliding block 11 matched with the sliding groove 9 in a fixed structure at the bottom, and the inductive switch 5 is connected with a bolt 8 through thread engagement on one side;Through the setting of the sliding groove 9 and the sliding block 11, the distance between the two inductive switches 5 can be adjusted, so that the distance between the load block 2 and the servo motor 12 is changed, and then it is suitable for testing screws of different lengths, and the practicability of the device is improved;Through the setting of the bolt 8, after adjusting the position of the inductive switch 5, the inductive switch 5 can be fixed by tightening the bolt 8, and the stability of the device operation is improved.

[0029] Specifically, the bottom of the two ends of the outer side of the load block 2 is provided with an inductive block 10 in a fixed structure;When the left inductive block 10 moves close to the left inductive switch 5 with the load block 2, the left inductive switch 5 transmits a signal to the PLC controller 6, and the PLC controller 6 controls the servo motor 12 to start reversing the nut, so that the screw retreats, and drives the load block 2 to change the moving direction, when the right inductive block 10 approaches the right inductive switch 5, repeat the above operation, so as to realize the reciprocating motion of the load block 2, and realize the cyclic test of the ball screw.

[0030] It should be noted that the clamping device includes a chuck 14, which is connected with the output end of the servo motor 12 through threaded engagement, and a collet 13 is clamped in the chuck 14; the collet 13 is used to clamp the nut, so that the nut can rotate together with the output end of the servo motor 12; the chuck 14 is engaged with the output end of the servo motor 12, the chuck 14 is tightened, the chuck 14 moves inward, the collet 13 is clamped with the chuck 14, so that the nut is clamped; the chuck 14 is loosened, the chuck 14 is separated from the collet 13, and the collet 13 releases the nut.

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

[0032] First, the distance between the servo motor 12 and the load block 2 is determined according to the length of the ball screw to be run-in, then the bolt 8 is loosened, and the two inductive switches 5 are moved to the appropriate position according to the distance length, and the bolt 8 is tightened, the bolt 8 abuts against the inner surface of the sliding groove 9, the sliding block 11 is lifted and contacts with the sliding groove 9, so that the inductive switch 5 is fixed; then the servo motor 12 is started, the load block 2 is close to the left inductive switch 5, then the nut is put into the collet 13, and the chuck 14 is tightened, the chuck 14 moves inward, the collet 13 is clamped with the chuck 14, the nut is clamped, then the end of the screw meshing with the nut is inserted into the positioning piece 3, and the fixed pin 4 is inserted into the positioning piece 3 and fixed through the connecting hole; then the servo motor 12 is started through the PLC controller 6, the output end of the servo motor 12 drives the nut to rotate, the rotary motion of the nut is converted into the linear motion of the screw, and the screw drives the load block 2 to move linearly; in the movement process, when the right inductive block 10 moves through the right inductive switch 5 along with the load block 2, the inductive switch transmits a signal to the PLC controller 6, the PLC controller 6 controls the servo motor 12 to start to drive the nut to reverse, so that the screw moves towards the nut, and drives the load block 2 to change the moving direction, when the left inductive block 10 passes through the left inductive switch 5, the above operation is repeated, so that the reciprocating motion of the load block 2 is realized, and the cycle test of the ball screw is realized.

[0033] In the description of the utility model, it is understood that the terms "center", "upper", "lower", "left", "right", "front", "rear", "left lower", "right upper", "outer", "clockwise", "counterclockwise" and other indicated orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicative or suggestive of 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 pair running-in apparatus characterized by comprising: The utility model relates to a kind of servo motor control load block, including: Operating platform (1); Servo motor (12) that drive nut rotates, servo motor (12) is arranged in fixed structure mode on the upper end surface of operating platform (1), and the output end of servo motor (12) is provided with chucking device for clamping nut; Load block (2), load block (2) is arranged in sliding structure mode on the upper end surface of operating platform (1); Positioning member (3) that can be inserted into lead screw, positioning member (3) is arranged in fixed structure mode on the side of load block (2) towards servo motor (12); Fixed pin (4), fixed pin (4) is connected with positioning member (3) in pluggable structure mode; Inductive switch (5) located at the both ends of the outer side of load block (2), two inductive switches (5) are arranged in sliding structure mode on the upper end surface of operating platform (1); Controller, controller is connected with servo motor (12) and inductive switch (5) by electricity.

2. Ball screw pair running-in apparatus according to claim 1, characterized in that Linear guide rail (7) is arranged in fixed structure mode between servo motor (12) and load block (2), and the slider of linear guide rail (7) is connected with load block (2) in fixed structure mode.

3. The ball screw raceway running-in apparatus according to claim 1, characterized by: Groove (9) is arranged below inductive switch (5), and groove (9) is connected with operating platform (1) in fixed structure mode; Inductive switch (5) bottom is provided with the slider (11) matched with groove (9) in fixed structure mode, and inductive switch (5) side is connected with bolt (8) by screw thread engagement.

4. Ball screw pair running-in apparatus according to claim 3, characterized in that Load block (2) outer side both ends are provided with inductive block (10) in fixed structure mode.

5. The ball screw raceway burnishing apparatus of claim 1, wherein: Controller is PLC controller (6).

6. The ball screw raceway burnishing apparatus according to claim 2, characterized by: Chucking device includes chuck (14), chuck (14) is connected with the output end of servo motor (12) by screw thread engagement, and chuck (14) is clamped with collet chuck (13) in.

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