Follow-up floating assembly device

Abstract

The utility model discloses a follow-up floating assembling device which comprises a horizontal bottom frame, two sets of horizontal sliding rails are symmetrically installed on the horizontal bottom frame, a horizontal driving air cylinder is installed between the two sets of horizontal sliding rails and above the horizontal bottom frame, and a connecting piece is installed on the horizontal driving air cylinder. An upright frame is mounted on the two groups of horizontal sliding rails and the connecting piece; an up-down driving servo motor and a vertical sliding rail are installed on the upright frame, one end of the up-down driving servo motor is connected with a lead screw assembly, one end of the lead screw assembly is connected with a floating mechanism, and the floating mechanism is installed on the vertical sliding rail. According to the follow-up floating assembly device, the requirement for the workpiece positioning precision is reduced, the machining, assembling and debugging difficulty is lowered, the software control difficulty is further lowered, and the fault rate is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic assembly of workpieces with square positioning stops or circular positioning stops, in particular to a follow-up floating assembly device. Background Art

[0002] There are two common situations for assembling workpieces with locating seams:

[0003] 1. Manual assembly is adopted. At the assembly station, the workpiece positioning stop is manually aligned, and the two workpieces are assembled into place by knocking or pressing.

[0004] The disadvantages of this method are: 1) increased labor costs and low assembly efficiency; 2) reliance on experienced operators and flexible manual operations; 3) high labor intensity, as some assembly tasks require operators to repeat actions repeatedly. Long-term high-intensity labor can easily lead to fatigue and occupational diseases.

[0005] 2. Use a robot to grab and assemble, and use different grippers for different parts. There are great limitations on the assembly of workpieces with precision requirements for positioning the stop.

[0006] The disadvantages of this method are: 1) The structure is complex, which requires high precision of the robot and is difficult to debug; 2) When the positioning precision of the workpiece to be assembled is high and a certain amount of pressure is required to make it fit, the gripper assembly can easily affect the accuracy of the robot and even damage the robot. Utility Model Content

[0007] (1) Technical problems solved

[0008] In response to the shortcomings of the existing technology, the utility model provides a follow-up floating assembly device. During the process of assembling the workpiece, the follow-up floating assembly device ensures precise positioning before the force is applied, and can adaptively float after the force is applied, thereby buffering the deviations of the workpiece in the lateral, longitudinal and angular directions during the assembly process. In addition, the requirements for the positioning accuracy of the workpiece are reduced, the difficulty of processing, assembly and debugging is reduced, the difficulty of software control is reduced, the failure rate is reduced, and the technical problems in the existing technology that the positioning stop of the assembled workpiece has high precision and the assembly limitations are large are solved.

[0009] (2) Technical solution

[0010] To achieve the above-mentioned object, the present invention provides the following technical solution: a follow-up floating assembly device, comprising a horizontal base frame, two sets of horizontal slide rails symmetrically mounted on the horizontal base frame, a horizontal driving cylinder mounted between the two sets of horizontal slide rails and above the horizontal base frame, a connecting member mounted on the horizontal driving cylinder, and an upright frame mounted on the two sets of horizontal slide rails and the connecting member;

[0011] The upright frame is provided with an up-and-down driving servo motor and a vertical slide rail, one end of the up-and-down driving servo motor is connected to a screw assembly, one end of the screw assembly is connected to a floating mechanism, and the floating mechanism is installed on the vertical slide rail;

[0012] The floating mechanism includes a slide plate installed on the vertical slide rail, the upper end of the slide plate is connected to one end of the screw assembly, a rotary indexing table is installed on the slide plate, a floating assembly assembly is installed on the rotary indexing table, a pneumatic quick lock is installed on the floating assembly assembly, and the clamping tooling assembly is connected through the pneumatic quick lock.

[0013] Furthermore, the floating assembly component includes a floating plate and an adapter plate, two conical positioning bushings and the pneumatic quick lock are symmetrically installed on the floating plate, and a conical floating positioning column passing through the floating plate is installed in each of the two conical positioning bushings. A first rectangular spring is set on the outer circumference of the two conical floating positioning columns and is fixed on the adapter plate. The floating assembly component is installed on the rotary indexing table through the adapter plate.

[0014] Furthermore, the clamping tooling assembly includes a bearing seat and a retaining frame, two linear bearings and a pressure rod are installed in the bearing seat, one end of the two linear bearings are connected to a workpiece positioning telescopic shaft, a second rectangular spring is set on the outer circumference of the two workpiece positioning telescopic shafts and passes through the retaining frame, and two plungers are installed on the retaining frame.

[0015] Furthermore, a limit buffer assembly is installed on the horizontal chassis at the front end of a group of the horizontal slide rails, which is used for limit protection of the floating mechanism in the lateral movement direction.

[0016] Furthermore, a left and right in-place detection component is installed on the horizontal chassis at the outer side of a group of the horizontal slide rails, which is used for position accuracy detection of the floating mechanism.

[0017] Furthermore, a zero limit position detection component is installed on one side of the upright frame to control the movement speed of the floating mechanism in the longitudinal direction, and immediately stop or slow down when obvious overspeed or power failure occurs.

[0018] (3) Beneficial effects

[0019] Compared with the prior art, the present invention provides a follow-up floating assembly device with the following features:

[0020] Beneficial effects:

[0021] 1. During the assembly process of the workpiece, the follow-up floating assembly device ensures precise positioning before the force is applied, and can adaptively float after the force is applied, thereby buffering the deviation of the workpiece in the lateral, longitudinal and angular directions during the assembly process, thereby improving work efficiency.

[0022] 2. The follow-up floating assembly device reduces the requirements for workpiece positioning accuracy, reduces the difficulty of processing, assembly and debugging, and also reduces the difficulty of software control and the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of a follow-up floating assembly device of the utility model;

[0024] Figure 2 This is a front cross-sectional view of a floating mechanism in a follow-up floating assembly device of the utility model;

[0025] In the figure: 1. Horizontal base frame; 2. Left and right positioning detection assembly; 3. Horizontal slide rail; 4. Horizontal drive cylinder; 5. Limit buffer assembly; 6. Connector; 7. Zero limit position detection assembly; 8. Vertical frame; 9. Screw assembly; 10. Up and down drive servo motor; 11. Vertical slide rail; 12. Floating mechanism; 13. Slide plate; 14. Rotary indexing table; 15. Adapter plate; 16. Conical floating positioning column; 17. Floating plate; 18. Conical positioning bushing; 19. Bearing seat; 20. Pressure rod; 21. Workpiece positioning telescopic shaft; 22. Plunger; 23. Workpiece; 24. Cage; 25. Second rectangular spring; 26. Linear bearing; 27. Pneumatic quick lock; 28. First rectangular spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-2, a follow-up floating assembly device includes a horizontal base frame 1, two groups of horizontal slide rails 3 are symmetrically installed on the horizontal base frame 1, and a limit buffer component 5 is installed at the front end of one group of horizontal slide rails 3 on the horizontal base frame 1 for limiting protection in the lateral movement direction of the floating mechanism; a left and right in-place detection component 2 is installed on the outer side of one group of horizontal slide rails 3 on the horizontal base frame 1 for position accuracy detection of the floating mechanism; a horizontal driving cylinder 4 is installed between the two groups of horizontal slide rails 3 and on the horizontal base frame 1, a connecting piece 6 is installed on the horizontal driving cylinder 4, an upright frame 8 is installed on the two groups of horizontal slide rails 3 and the connecting piece 6, and a zero point limit position detection component 7 is installed on one side of the upright frame 8 for controlling the floating mechanism. The movement speed of the driving mechanism in the longitudinal direction will stop or slow down immediately when an obvious overspeed or power outage occurs; the upright frame 8 is equipped with an up and down driving servo motor 10 and a vertical slide rail 11, one end of the up and down driving servo motor 10 is connected to a screw assembly 9, one end of the screw assembly 9 is connected to a floating mechanism 12, and the floating mechanism 12 is installed on the vertical slide rail 11; the floating mechanism 12 includes a slide plate 13 installed on the vertical slide rail 11, the upper end of the slide plate 13 is connected to one end of the screw assembly 9, a rotary indexing table 14 is installed on the slide plate 13, a floating assembly assembly is installed on the rotary indexing table 14, a pneumatic quick lock 27 is installed on the floating assembly assembly, and the clamping tooling assembly is connected through the pneumatic quick lock 27.

[0028] In the above embodiment, the floating assembly assembly includes a floating plate 17 and an adapter plate 15. Two conical positioning bushings 18 and a centrally installed pneumatic quick lock 27 are symmetrically installed on the floating plate 17. Conical floating positioning columns 16 passing through the floating plate 17 are installed in the two conical positioning bushings 18. The outer circumference of the two conical floating positioning columns 16 is fitted with a first rectangular spring 28 and then fixed on the adapter plate 15. The floating assembly assembly is installed on the rotary indexing table 14 through the adapter plate 15.

[0029] In the above embodiment, the clamping tooling assembly includes a bearing seat 19 and a retaining frame 24. Two linear bearings 26 and a pressure rod 20 are installed in the bearing seat 19. One end of the two linear bearings 26 is connected to a workpiece positioning telescopic shaft 21. A second rectangular spring 25 is set on the outer circumference of the two workpiece positioning telescopic shafts 21 and passes through the retaining frame 24. Two plungers 22 are installed on the retaining frame 24.

[0030] The working principle of the above embodiment includes the following steps:

[0031] S1: The workpiece 23 is grasped by a mechanical gripper and placed on the positioning telescopic shaft 21. The plunger 22 prevents the workpiece 23 from falling off during the displacement process. Before the workpiece 23 is pressed, the first rectangular spring 28 and the second rectangular spring 25 are in an extended state. The outer bevel of the front end of the conical floating positioning column 16 and the inner bevel of the conical positioning bushing 18 fit together. Before performing step S1, the pneumatic quick lock 27 can match the clamping fixture components of different types of workpieces according to the needs of assembling different types of workpieces, allowing for quick replacement of the clamping fixture components.

[0032] S2, through the operation of the servo motor 10, the screw assembly 9 and the floating mechanism 12 move up and down on the vertical slide 11 to adjust the longitudinal position of the workpiece 23, and the rotary indexing table 14 rotates to adjust the angular position of the workpiece 23 so that it is aligned with the positioning stop of the loaded workpiece;

[0033] S3, through the operation of the horizontal driving cylinder 4, the connecting member 6 and the upright frame 8 are driven to move on the horizontal slide rail 3, thereby pushing the floating mechanism 12 to move horizontally, so that the workpiece 23 contacts the loaded workpiece, and the positioning stop of the workpiece 23 enters the guide chamfer of the loaded workpiece. At the same time, the pressure rod 20 is close to the workpiece 23. At this time, the workpiece 23 positioning telescopic shaft 21 is first retracted by force, and the stopper 22 moves from the end face of the workpiece 23 to the side face of the workpiece 23. The horizontal driving cylinder 4 continues to push forward. After the workpiece 23 contacts deeper with the loaded workpiece, the floating plate 17 is retracted by force to the limit point and contacts the adapter plate 15. The outer inclined surface of the front end of the conical floating positioning column 16 is separated from the inner inclined surface of the conical positioning bushing 18. At this time, the workpiece 23 can float arbitrarily within an appropriate range, and the horizontal driving cylinder 4 continues to push forward again, so that the workpiece 23 and the positioning stop of the loaded workpiece are adaptively fitted;

[0034] S4, the workpiece positioning stop is installed, the proximity switch feeds back a position signal, the horizontal drive cylinder 4 retracts to its original position, the first rectangular spring 28 and the second rectangular spring 25 automatically extend, and the floating mechanism 12 returns to the precise positioning state.

[0035] To sum up, during the process of assembling the workpiece, the follow-up floating assembly device ensures precise positioning before being subjected to force, and can adaptively float after being subjected to force, thereby buffering the deviations of the workpiece in the lateral, longitudinal and angular directions during the assembly process, thereby improving work efficiency; the follow-up floating assembly device reduces the requirements for workpiece positioning accuracy, reduces the difficulty of processing, assembly and debugging, and also reduces the difficulty of software control and reduces the failure rate.

[0036] It should be noted that, if in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, it does not necessarily require or imply any 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 that includes 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. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A follow-up floating assembly device, comprising a horizontal base frame (1), characterized in that: Two groups of horizontal slide rails (3) are symmetrically mounted on the horizontal base frame (1); a horizontal driving cylinder (4) is mounted between the two groups of horizontal slide rails (3) and on the horizontal base frame (1); a connecting member (6) is mounted on the horizontal driving cylinder (4); and a vertical frame (8) is mounted on the two groups of horizontal slide rails (3) and the connecting member (6); The upright frame (8) is provided with an up-and-down driving servo motor (10) and a vertical slide rail (11); one end of the up-and-down driving servo motor (10) is connected to a screw assembly (9); one end of the screw assembly (9) is connected to a floating mechanism (12); and the floating mechanism (12) is installed on the vertical slide rail (11); The floating mechanism (12) includes a slide plate (13) installed on the vertical slide rail (11), the upper end of the slide plate (13) is connected to one end of the screw assembly (9), a rotary indexing table (14) is installed on the slide plate (13), a floating assembly assembly is installed on the rotary indexing table (14), a pneumatic quick lock (27) is installed on the floating assembly assembly, and a clamping tooling assembly is connected via the pneumatic quick lock (27).

2. A follow-up floating assembly device according to claim 1, characterized in that: The floating assembly component comprises a floating plate (17) and an adapter plate (15); two conical positioning bushings (18) and a pneumatic quick lock (27) installed in the center are symmetrically mounted on the floating plate (17); a conical floating positioning column (16) passing through the floating plate (17) is installed in each of the two conical positioning bushings (18); a first rectangular spring (28) is sleeved on the outer circumference of the two conical floating positioning columns (16) and then fixedly mounted on the adapter plate (15); the floating assembly component is mounted on the rotary indexing table (14) via the adapter plate (15).

3. The follow-up floating assembly device according to claim 1 is characterized in that: The clamping fixture assembly comprises a bearing seat (19) and a retaining frame (24), two linear bearings (26) and a pressure rod (20) are installed in the bearing seat (19), one end of the two linear bearings (26) are connected to a workpiece positioning telescopic shaft (21), a second rectangular spring (25) is sleeved on the outer circumference of the two workpiece positioning telescopic shafts (21) and passes through the retaining frame (24), and two plungers (22) are installed on the retaining frame (24).

4. The follow-up floating assembly device according to claim 1 is characterized in that: A limit buffer assembly (5) is installed on the horizontal base frame (1) at the front end of a group of horizontal slide rails (3).

5. The follow-up floating assembly device according to claim 1 is characterized in that: A left and right in-place detection assembly (2) is installed on the horizontal base frame (1) and located outside a group of horizontal slide rails (3).

6. The follow-up floating assembly device according to claim 1 is characterized in that: A zero limit position detection component (7) is installed on one side of the upright frame (8).

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