Ball screw assembly fixture

Abstract

The utility model relates to the technical field of ball screw assembly, in particular to a ball screw assembly clamp which can be suitable for assembly of screws and nuts with different calibers, improves the use flexibility of the device, screens balls, prevents irregular and unqualified balls from entering the nuts, and improves the production efficiency. The transmission efficiency is influenced; comprising a fixing mechanism; the device further comprises two sets of moving mechanisms, a sleeve mechanism, a screening mechanism and a conveying mechanism, the two sets of moving mechanisms are both installed on the fixing mechanism and drive the nut to move, the sleeve mechanism is installed on the fixing mechanism and enables balls to be conveniently installed in the nut, and the screening mechanism is installed on the fixing mechanism and screens the balls. The conveying mechanism is installed on the screening mechanism and conveys the balls into the nuts.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screw assembly, in particular to a ball screw assembly fixture. Background Art

[0002] Ball screws are the most commonly used transmission elements in tool machinery and precision machinery. Their main function is to convert rotational motion into linear motion, or to convert torque into axial repetitive force. They also have the characteristics of high precision, reversibility and high efficiency. Due to their very small friction resistance, ball screws are widely used in various industrial equipment and precision instruments.

[0003] Existing ball screw assembly fixtures, such as a nut assembly fixture for a precision ball screw disclosed in the utility model patent with application number 202220363686.0, have a main structure including a feed pipe, an inner bottom wall of the feed pipe is rotatably connected to a screw dragon through a bearing, an outer sleeve is arranged at the outer periphery of the upper part of the feed pipe, a limit rod is arranged on the inner wall of the cavity away from the feed pipe, a spring is arranged at the outer periphery of the limit rod, a clamping block is arranged on the side of the spring close to the feed pipe, a connecting rod is arranged on the side of the clamping block away from the feed pipe, a drive bin is arranged at the lower part of the feed pipe, a motor is arranged inside the drive bin, and a positioning sleeve is arranged at the lower part of the drive bin; when in use, the nut body is first passed through the positioning sleeve and the drive bin, so that the upper end of the nut body enters the inner part of the outer sleeve and opens Start squeezing the chamfer of the block and squeeze the block around so that the nut body can continue to move until it is in the proper position. Then, under the action of the spring, the block is pushed toward the feed pipe so that the block tightly clamps the nut body and fixes the nut body by plugging and pulling. Then, insert one end of the screw body into the positioning sleeve, pour an appropriate amount of balls into the hopper, start the motor, and rotate the auger to move the balls downward and squeeze them out from the discharge port to enter the threaded groove of the nut body. When all the balls are installed, slowly pull the nut body downward. During the movement, the balls are blocked by the drive bin and the positioning sleeve and will not fall off. When the nut body moves to the upper part of the screw body, slowly rotate the nut body to move the nut body onto the screw body.

[0004] However, the existing assembly fixture cannot be applied to nuts of different calibers, has a narrow application range, and lacks screening of balls before assembly. It is very likely that unqualified balls will be assembled on the screw, affecting the transmission efficiency. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a ball screw assembly fixture which is not only suitable for the assembly of screws and nuts of different calibers, thereby improving the flexibility of the device, but also screens the balls to prevent irregular and unqualified balls from entering the nuts and affecting the transmission efficiency.

[0006] The utility model discloses a ball screw assembly fixture, comprising a fixing mechanism; further comprising two groups of moving mechanisms, a sleeve mechanism, a screening mechanism and a conveying mechanism, wherein the two groups of moving mechanisms are mounted on the fixing mechanism and drive the nut to move, the sleeve mechanism is mounted on the fixing mechanism and facilitates the installation of the ball into the nut, the screening mechanism is mounted on the fixing mechanism and screens the ball, and the conveying mechanism is mounted on the screening mechanism and conveys the ball into the nut; the fixing mechanism fixes the lead screw, and then the staff places the nut on the two groups of moving mechanisms, the sleeve mechanism is inserted into the nut, the screening mechanism screens the ball, and the screened qualified ball is conveyed into the nut by the conveying mechanism, and at the same time, the sleeve mechanism can adjust the diameter according to nuts of different calibers, and the ball is installed into the nut, and then the sleeve mechanism and the two groups of moving mechanisms drive the installed nut to descend, and the nut is installed on the lead screw.

[0007] Preferably, the fixing mechanism includes a base, a support frame, three groups of hydraulic cylinders and three groups of fixing plates. The bottom end of the base is connected to the ground, a positioning hole is opened on the base, the bottom end of the support frame is connected to the top end of the base, the three groups of hydraulic cylinders are installed in the positioning holes of the base, and the three groups of fixing plates are respectively installed on the three groups of hydraulic cylinders; the screw rod is inserted into the positioning hole of the base, the three groups of hydraulic cylinders are started, and the three groups of hydraulic cylinders push the three groups of fixing plates to fix and clamp the bottom end of the screw rod.

[0008] Preferably, the moving mechanism includes a servo motor, a lead screw, a slider, a cylinder, a support platform, a connecting frame and a guide wheel. The bottom end of the servo motor is connected to the top end of the support frame, and the support frame is provided with two sets of grooves. The lead screw is rotatably installed in the groove of the support frame, and the slider is slidably installed on the lead screw, the cylinder is installed on the slider, the support platform is installed on the cylinder, the connecting frame is rotatably installed on the support platform, and the guide wheel is rotatably installed on the connecting frame, and the two sets of moving mechanisms are relatively installed on the support frame; the two sets of cylinders push the two sets of support platforms closer together, and the two sets of guide wheels support the top end of the lead screw to prevent the lead screw from tilting. The staff places the nut on the top end of the two sets of support platforms. When the ball enters the nut, the servo motor is started, and the servo motor drives the lead screw to rotate, and the lead screw drives the slider and the cylinder to move downward. At the same time, the two sets of cylinders pull the two sets of support platforms to gradually separate, and the nut is installed on the lead screw. During the downward movement, the connecting frame rebounds upward to drive the guide wheel to always contact the surface of the lead screw to maintain the stability of the lead screw.

[0009] Preferably, the sleeve mechanism includes hydraulic cylinder 2, transmission device, motor 1, spindle, six groups of micro-electric cylinders, three groups of push plates and three groups of telescopic plates. The top of hydraulic cylinder 2 is connected to the top of the support frame, the top of the transmission device is connected to the bottom of hydraulic cylinder 2, motor 1 is installed on the transmission device, the spindle is rotatably installed on the transmission device, the six groups of micro-electric cylinders are all installed on the spindle, the push plates are installed on the two groups of micro-electric cylinders on the same side, and the telescopic plates are installed between the two adjacent groups of push plates. Start hydraulic cylinder 2, hydraulic cylinder 2 pushes the spindle downward so that the spindle is inserted into the nut and The bottom end of the main shaft is connected to the top ends of the two groups of support platforms, and then the six groups of micro-electric cylinders push the three groups of push plates to expand outward to adapt to the caliber of the nut. At the same time, the three groups of push plates expand outward to pull the three groups of telescopic plates to extend. Then the conveying mechanism conveys the balls into the nut and starts motor one. Motor one drives the main shaft through the transmission device. The main shaft drives the push plates and telescopic plates to rotate, accelerating the balls to enter the threads. After all the balls enter the threads, hydraulic cylinder two pushes the main shaft to follow the nut and the support platform down, and the top end of the main shaft is connected to the top end of the screw rod, and the nut enters onto the screw rod.

[0010] Preferably, the screening mechanism includes a storage box, a sieve plate, a discharge hopper, a second motor, a reducer, a rotating shaft and six groups of stirring plates. The bottom end of the storage box is connected to the top end of the support frame, a cavity is provided inside the storage box, the sieve plate is installed at the bottom end of the storage box, the top end of the discharge hopper is connected to the bottom end of the sieve plate and is communicated with the inside of the cavity of the storage box, the second motor is installed on the storage box, the reducer is installed on the storage box, the rotating shaft is rotatably installed in the cavity of the storage box and is longitudinally connected to the reducer, and the six groups of stirring plates are all installed on the rotating shaft; the staff pours the balls into the cavity of the storage box, and the qualified balls enter the discharge hopper through the sieve plate, and starts the second motor. The second motor drives the rotating shaft to rotate through the reducer, and the rotating shaft drives the six groups of stirring plates to rotate to stir the balls to prevent unqualified balls from being blocked on the sieve plate.

[0011] Preferably, the conveying mechanism includes a conveying hose, an electric cylinder and a metering valve, the top end of the conveying hose is connected to the bottom end of the discharge hopper, the electric cylinder is installed on the transmission device, and the metering valve is installed on the electric cylinder and connected to the inside of the conveying hose; according to the size of the nut diameter, the electric cylinder is started to pull the metering valve to prevent the ball from falling to the outside of the nut, and then the metering valve is opened, and the ball in the discharge hopper is conveyed to the nut through the conveying hose.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the fixing mechanism fixes the lead screw, and then the staff places the nut on two sets of moving mechanisms, the sleeve mechanism is inserted into the nut, the screening mechanism screens the balls, and the qualified balls are transported to the nuts by the conveying mechanism. At the same time, the sleeve mechanism can adjust the diameter according to nuts of different calibers, and the balls are installed in the nuts. Then the sleeve mechanism and the two sets of moving mechanisms drive the installed nuts to descend, and the nuts are installed on the lead screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0014] Figure 2 It is a partially enlarged axonometric structural diagram of the fixing mechanism of the utility model;

[0015] Figure 3 It is a partially enlarged cross-sectional axonometric structural schematic diagram of the mobile mechanism of the utility model;

[0016] Figure 4 It is a partially enlarged cross-sectional axonometric structural schematic diagram of the sleeve mechanism of the utility model;

[0017] Figure 5 It is a partially enlarged cross-sectional isometric structural diagram of the sleeve mechanism and the conveying mechanism of the utility model;

[0018] Figure 6 It is a partially enlarged axonometric structural schematic diagram of the screening mechanism of the utility model;

[0019] Figure 7 It is a partially enlarged sectional axonometric structural schematic diagram of the screening mechanism and the conveying mechanism of the utility model.

[0020] Markings in the attached drawings: 01, fixing mechanism; 11, base; 12, support frame; 13, hydraulic cylinder 1; 14, fixed plate; 02, moving mechanism; 21, servo motor; 22, screw; 23, slider; 24, cylinder; 25, support platform; 26, connecting frame; 27, guide wheel; 03, sleeve mechanism; 31, hydraulic cylinder 2; 32, transmission device; 33, motor 1; 34, main shaft; 35, micro electric cylinder; 36, push plate; 37, telescopic plate; 04, screening mechanism; 41, storage box; 42, sieve plate; 43, discharge hopper; 44, motor 2; 45, reducer; 46, rotating shaft; 47, stirring plate; 05, conveying mechanism; 51, conveying hose; 52, electric cylinder; 53, metering valve. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0022] Example 1

[0023] The utility model is a ball screw assembly fixture, comprising a fixing mechanism 01; also comprising two groups of moving mechanisms 02, a sleeve mechanism 03, a screening mechanism 04 and a conveying mechanism 05, the two groups of moving mechanisms 02 are mounted on the fixing mechanism 01 and drive the nut to move, the sleeve mechanism 03 is mounted on the fixing mechanism 01 and facilitates the installation of the ball into the nut, the screening mechanism 04 is mounted on the fixing mechanism 01 and screens the ball, the conveying mechanism 05 is mounted on the screening mechanism 04 and conveys the ball into the nut; the fixing mechanism The mobile mechanism 01 includes a base 11, a support frame 12, three groups of hydraulic cylinders 13 and three groups of fixed plates 14. The bottom end of the base 11 is connected to the ground, and a positioning hole is opened on the base 11. The bottom end of the support frame 12 is connected to the top of the base 11. The three groups of hydraulic cylinders 13 are installed in the positioning holes of the base 11, and the three groups of fixed plates 14 are installed on the three groups of hydraulic cylinders 13 respectively; the mobile mechanism 02 includes a servo motor 21, a lead screw 22, a slider 23, a cylinder 24, a support platform 25, a connecting frame 26 and a guide wheel 27. The servo motor 21 is connected to the ground, and a positioning hole is opened on the base 11. The bottom end of the support frame 12 is connected to the top of the base 11. The three groups of hydraulic cylinders 13 are installed in the positioning holes of the base 11, and the three groups of fixed plates 14 are installed on the three groups of hydraulic cylinders 13 respectively. The bottom end of the motor 21 is connected to the top end of the support frame 12. The support frame 12 has two sets of grooves. The lead screw 22 is rotatably installed in the groove of the support frame 12. The slider 23 is slidably installed on the lead screw 22. The cylinder 24 is installed on the slider 23. The support platform 25 is installed on the cylinder 24. The connecting frame 26 is rotatably installed on the support platform 25. The guide wheel 27 is rotatably installed on the connecting frame 26. The two sets of moving mechanisms 02 are relatively installed on the support frame 12; the sleeve mechanism 03 includes a hydraulic cylinder 231, a transmission device 32, and an electric Motor 1 33, spindle 34, six groups of micro electric cylinders 35, three groups of push plates 36 and three groups of telescopic plates 37, the top of hydraulic cylinder 2 31 is connected to the top of support frame 12, the top of transmission device 32 is connected to the bottom of hydraulic cylinder 2 31, motor 1 33 is mounted on transmission device 32, spindle 34 is rotatably mounted on transmission device 32, six groups of micro electric cylinders 35 are all mounted on spindle 34, push plates 36 are mounted on two groups of micro electric cylinders 35 on the same side, and telescopic plates 37 are mounted between two adjacent groups of push plates 36;When it is working, first, insert the screw into the positioning hole of the base 11, start the three groups of hydraulic cylinders 13, the three groups of hydraulic cylinders 13 push the three groups of fixed plates 14 to fix and clamp the bottom end of the screw, the two groups of cylinders 24 push the two groups of support platforms 25 close together, the two groups of guide wheels 27 support the top of the screw to prevent the screw from tilting, the staff places the nut on the top of the two groups of support platforms 25, start the hydraulic cylinder 2 31, the hydraulic cylinder 2 31 pushes the main shaft 34 downward so that the main shaft 34 is inserted into the nut and the bottom end of the main shaft 34 is connected to the top of the two groups of support platforms 25, then the six groups of micro-electric cylinders 35 push the three groups of push plates 36 to expand outward to adapt to the caliber of the nut, and at the same time, the three groups of push plates 36 expand outward to pull the three groups of telescopic plates 37 to extend, and then the conveying mechanism 05 The balls are transported into the nut, and the motor 1 33 is started. The motor 1 33 drives the main shaft 34 through the transmission device 32. The main shaft 34 drives the push plate 36 and the telescopic plate 37 to rotate, accelerating the balls to enter the thread. After all the balls enter the thread, the servo motor 21 is started. The servo motor 21 drives the screw 22 to rotate. The screw 22 drives the slider 23 and the cylinder 24 to move downward. At the same time, the two groups of cylinders 24 pull the two groups of support platforms 25 to gradually separate. The hydraulic cylinder 2 31 pushes the main shaft 34 to follow the nut and the support platform 25 to descend. The top of the main shaft 34 is connected to the top of the screw rod, and the nut enters the screw rod. When the balls enter the nut, the connecting frame 26 rebounds upward during the downward movement, driving the guide wheel 27 to always contact the surface of the screw rod to maintain the stability of the screw rod. ;

[0024] Example 2

[0025] like Figures 1 to 7As shown, a ball screw assembly fixture of the utility model is based on Example 1; the screening mechanism 04 includes a storage box 41, a sieve plate 42, a discharge hopper 43, a second motor 44, a reducer 45, a rotating shaft 46 and six groups of stirring plates 47, the bottom end of the storage box 41 is connected to the top of the support frame 12, the interior of the storage box 41 is provided with a cavity, the sieve plate 42 is installed at the bottom end of the storage box 41, the top of the discharge hopper 43 is connected to the bottom end of the sieve plate 42, and is communicated with the interior of the cavity of the storage box 41, the second motor 44 is installed on the storage box 41, the reducer 45 is installed on the storage box 41, the rotating shaft 46 is rotatably installed in the cavity of the storage box 41 and is longitudinally connected to the reducer 45, and the six groups of stirring plates 47 are all installed on the rotating shaft 46; the conveying mechanism 05 It includes a feeding hose 51, an electric cylinder 52 and a metering valve 53. The top end of the feeding hose 51 is connected to the bottom end of the discharge hopper 43. The electric cylinder 52 is installed on the transmission device 32. The metering valve 53 is installed on the electric cylinder 52 and is connected to the inside of the feeding hose 51. When it is working, first, the screw rod is inserted into the positioning hole of the base 11, and the three groups of hydraulic cylinders 13 are started. The three groups of hydraulic cylinders 13 push the three groups of fixing plates 14 to fix and clamp the bottom end of the screw rod. The two groups of cylinders 24 push the two groups of support platforms 25 close together. The two groups of guide wheels 27 support the top end of the screw rod to prevent the screw rod from tilting. The staff puts the nut on the top end of the two groups of support platforms 25, starts the hydraulic cylinder 2 31, and the hydraulic cylinder 2 31 pushes the main shaft 34 downward so that the main shaft 34 is inserted into the nut and the main shaft The bottom end of 34 is connected with the top end of two groups of support platforms 25, and then six groups of micro-electric cylinders 35 push three groups of push plates 36 to expand outward to adapt to the caliber of the nut. At the same time, the three groups of push plates 36 expand outward to pull the three groups of telescopic plates 37 to extend. Then the staff pours the balls into the cavity of the storage box 41, and the qualified balls pass through the sieve plate 42 into the discharge hopper 43, and starts the second motor 44. The second motor 44 drives the shaft 46 to rotate through the reducer 45, and the shaft 46 drives the six groups of stirring plates 47 to rotate to stir the balls to prevent unqualified balls from being blocked on the sieve plate 42. According to the size of the nut caliber, the electric cylinder 52 is started to pull the metering valve 53 to prevent the balls from falling to the outside of the nut, and then the metering valve 53 is opened, and the balls in the discharge hopper 43 pass through the feeding soft The tube 51 is transported into the nut, and the motor 33 is started. The motor 33 drives the main shaft 34 through the transmission device 32. The main shaft 34 drives the push plate 36 and the telescopic plate 37 to rotate, and accelerates the balls to enter the thread. After all the balls enter the thread, the servo motor 21 is started, and the servo motor 21 drives the screw 22 to rotate. The screw 22 drives the slider 23 and the cylinder 24 to move downward. At the same time, the two groups of cylinders 24 pull the two groups of support platforms 25 to gradually separate. The hydraulic cylinder 2 31 pushes the main shaft 34 to follow the nut and the support platform 25 to descend. The top of the main shaft 34 is connected to the top of the screw rod, and the nut enters the screw rod. After the ball enters the nut, the connecting frame 26 rebounds upward during the downward movement, driving the guide wheel 27 to always contact the surface of the screw rod to maintain the stability of the screw rod.

[0026] The servo motor 21, motor 1 33, motor 2 44 and reducer 45 of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manuals without the need for creative work by technicians in this field.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A ball screw assembly fixture, comprising a fixing mechanism (01); characterized in that: It also includes two groups of moving mechanisms (02), a sleeve mechanism (03), a screening mechanism (04) and a conveying mechanism (05). The two groups of moving mechanisms (02) are both mounted on the fixed mechanism (01) and drive the nut to move. The sleeve mechanism (03) is mounted on the fixed mechanism (01) and facilitates the installation of the ball into the nut. The screening mechanism (04) is mounted on the fixed mechanism (01) and screens the ball. The conveying mechanism (05) is mounted on the screening mechanism (04) and conveys the ball into the nut.

2. A ball screw assembly fixture as claimed in claim 1, characterized in that: The fixing mechanism (01) comprises a base (11), a support frame (12), three groups of hydraulic cylinders (13) and three groups of fixing plates (14); the bottom end of the base (11) is connected to the ground, a positioning hole is opened on the base (11), the bottom end of the support frame (12) is connected to the top end of the base (11), the three groups of hydraulic cylinders (13) are all installed in the positioning holes of the base (11), and the three groups of fixing plates (14) are respectively installed on the three groups of hydraulic cylinders (13).

3. A ball screw assembly fixture as claimed in claim 2, characterized in that: The moving mechanism (02) comprises a servo motor (21), a lead screw (22), a slider (23), a cylinder (24), a support platform (25), a connecting frame (26) and a guide wheel (27). The bottom end of the servo motor (21) is connected to the top end of the support frame (12). The support frame (12) is provided with two groups of grooves. The lead screw (22) is rotatably mounted in the groove of the support frame (12). The slider (23) is slidably mounted on the lead screw (22). The cylinder (24) is mounted on the slider (23). The support platform (25) is mounted on the cylinder (24). The connecting frame (26) is rotatably mounted on the support platform (25). The guide wheel (27) is rotatably mounted on the connecting frame (26). The two groups of moving mechanisms (02) are relatively mounted on the support frame (12).

4. A ball screw assembly fixture as claimed in claim 2, characterized in that: The sleeve mechanism (03) comprises a second hydraulic cylinder (31), a transmission device (32), a first motor (33), a main shaft (34), six groups of micro-electric cylinders (35), three groups of push plates (36) and three groups of telescopic plates (37). The top end of the second hydraulic cylinder (31) is connected to the top end of the support frame (12), the top end of the transmission device (32) is connected to the bottom end of the second hydraulic cylinder (31), the first motor (33) is mounted on the transmission device (32), the main shaft (34) is rotatably mounted on the transmission device (32), the six groups of micro-electric cylinders (35) are all mounted on the main shaft (34), the push plates (36) are mounted on two groups of micro-electric cylinders (35) on the same side, and the telescopic plate (37) is mounted between two adjacent groups of push plates (36).

5. A ball screw assembly fixture as claimed in claim 2, characterized in that: The screening mechanism (04) comprises a material storage box (41), a sieve plate (42), a material discharge hopper (43), a second motor (44), a speed reducer (45), a rotating shaft (46) and six groups of stirring plates (47). The bottom end of the material storage box (41) is connected to the top end of the support frame (12). A cavity is arranged inside the material storage box (41). The sieve plate (42) is mounted at the bottom end of the material storage box (41). The top end of the material discharge hopper (43) is connected to the bottom end of the sieve plate (42) and communicates with the inside of the cavity of the material storage box (41). The second motor (44) is mounted on the material storage box (41). The speed reducer (45) is mounted on the material storage box (41). The rotating shaft (46) is rotatably mounted in the cavity of the material storage box (41) and is longitudinally connected to the speed reducer (45). The six groups of stirring plates (47) are all mounted on the rotating shaft (46).

6. A ball screw assembly fixture as claimed in claim 5, characterized in that: The conveying mechanism (05) comprises a conveying hose (51), an electric cylinder (52) and a metering valve (53). The top end of the conveying hose (51) is connected to the bottom end of the discharge hopper (43). The electric cylinder (52) is mounted on the transmission device (32). The metering valve (53) is mounted on the electric cylinder (52) and is connected to the inside of the conveying hose (51).

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