Nut locking equipment

Abstract

The utility model discloses nut locking equipment which comprises an installation frame, a driving mechanism fixed to the installation frame and a locking mechanism in transmission connection with the driving mechanism. The driving mechanism comprises a driving shaft capable of being driven to rotate, the locking mechanism comprises a transmission shaft and a locking assembly in transmission connection with the transmission shaft, and the locking assembly is used for providing torque for a nut; wherein a torsion sensor for detecting a torque value is connected between the driving shaft and the transmission shaft. When the nut locking equipment runs, the driving mechanism can drive the locking mechanism to run, so that torque is provided for the nut through the locking mechanism, and locking of the nut is completed. The torsion sensor is connected with the driving shaft and the transmission shaft, so that the torque value output by the locking assembly can be obtained in real time, the locking force of the nut is accurately controlled, and the effectiveness of connection between different workpieces is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of nut locking, in particular to a nut locking device. Background Art

[0002] Nuts are common fasteners used in various fields of industrial production. With the rapid development of modern industry, assembly requirements are becoming increasingly stringent, and higher requirements are also being placed on nut locking equipment to ensure assembly efficiency, tightening force, and safety.

[0003] A ball valve is a valve used for fluid control. Its main structure consists of a valve ball and two valve seats. The valve ball has a through-hole. Rotating the valve ball controls the flow and flow of the fluid. The two valve seats of the ball valve need to be locked with nuts during assembly to ensure the subsequent normal operation of the ball valve. During ball valve assembly, it is often necessary to precisely control the tightening force of the different nuts to ensure the performance of the ball valve.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a nut locking device. Utility Model Content

[0005] The purpose of the utility model is to provide a nut locking device, which can solve the problem that the locking force of the nut cannot be accurately controlled.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by a specific embodiment of the present invention is as follows:

[0007] A nut locking device comprises a mounting frame, a driving mechanism fixed to the mounting frame, and a locking mechanism transmission-connected to the driving mechanism;

[0008] The driving mechanism includes a driving shaft that can be driven to rotate, and the locking mechanism includes a transmission shaft and a locking assembly that is transmission-connected to the transmission shaft, and the locking assembly is used to provide torque to the nut; wherein a torque sensor for detecting the torque value is connected between the driving shaft and the transmission shaft.

[0009] In one or more embodiments of the present invention, the locking assembly includes a housing, a first gear and a second gear rotatably mounted in the housing; the transmission shaft is transmission-connected to the first gear, the first gear is transmission-connected to the second gear, and the second gear is provided with a through groove for accommodating a nut, and the groove wall of the through groove can engage with the outer peripheral wall of the nut.

[0010] In one or more embodiments of the present invention, the shell is movably mounted on the mounting bracket, an abutment block is fixedly connected to the outer periphery of the transmission shaft, and an elastic member is provided between the abutment block and the shell; when the locking assembly is close to the nut, the elastic member can be compressed to release the elastic potential energy that allows the second gear to sleeve the nut.

[0011] In one or more embodiments of the present invention, a positioning pin is fixed on the mounting frame, a through hole is opened in the shell, the positioning pin is passed through the through hole, and the shell can slide along the extension direction of the positioning pin.

[0012] In one or more embodiments of the present invention, the nut locking device also includes a workbench for placing a workpiece, a support frame installed on the workbench, and a pressing mechanism installed on the support frame, wherein the pressing mechanism includes a pressing head that can be driven close to or away from the workbench to support or move away from the workpiece.

[0013] In one or more embodiments of the present invention, the pressing mechanism also includes a pressing drive fixed to the support frame, a floating joint installed at the output end of the pressing drive, and a pressing rod connected to the floating joint. The pressing head can be rotatably connected to the end of the pressing rod away from the floating joint around its own axis.

[0014] In one or more embodiments of the present invention, the nut locking device also includes a lifting mechanism for driving the mounting frame to move closer to or away from the workbench, the lifting mechanism includes a mounting seat installed on the support frame, a lifting drive installed on the mounting seat, and a lifting frame connected to the output end of the lifting drive, and the mounting frame is fixedly connected to the lifting frame.

[0015] In one or more embodiments of the present invention, the lifting frame includes a first connecting plate that is transmission-connected to the output end of the lifting drive member, a connecting rod fixedly connected to the first connecting plate, and a second connecting plate fixedly connected to an end of the connecting rod away from the first connecting plate; the connecting rod is slidably inserted into the mounting seat, and the second connecting plate is fixedly connected to the mounting frame.

[0016] In one or more embodiments of the present invention, the nut locking device also includes a movable driving member fixedly connected to the support frame, the mounting seat is slidingly connected to the support frame, and the movable driving member drives the mounting seat to move toward or away from the pressing mechanism.

[0017] In one or more embodiments of the present invention, the nut locking device also includes a rotating mechanism fixedly connected to the workbench, the rotating mechanism includes a turntable that can be driven to rotate around its own axis, the turntable is equipped with a limiting member for fixing the workpiece to be locked, and the turntable can be rotated to different installation positions.

[0018] Compared to existing technologies, the nut locking device of the present invention operates by activating a drive mechanism that drives the locking mechanism, thereby providing torque to the nut to tighten it. Torque sensors are connected to the drive shaft and transmission shaft, respectively, to obtain real-time torque output from the locking assembly. This allows for precise control of the nut's tightening force, ensuring effective connections between different workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of a nut locking device in one embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the assembly of the mounting frame, the driving mechanism, the locking mechanism, and the lifting mechanism in one embodiment of the present utility model;

[0022] Figure 3 for Figure 1 A in the middle is an enlarged schematic diagram;

[0023] Figure 4 This is a structural diagram of a locking assembly in one embodiment of the present utility model;

[0024] Figure 5 This is a schematic structural diagram of a press-fitting mechanism and a support frame in one embodiment of the present utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of a press-fitting mechanism in one embodiment of the present utility model;

[0026] Figure 7 for Figure 1 The enlarged schematic diagram of point B in the middle;

[0027] Figure 8 It is a structural schematic diagram of the rotating mechanism in one embodiment of the present utility model.

[0028] Description of main reference numerals:

[0029] 1. Mounting frame; 11. Positioning pin; 2. Driving mechanism; 21. Active shaft; 22. Locking drive member; 23. Transmission member; 3. Locking mechanism; 31. Housing; 311. Through hole; 32. First gear; 33. Second gear; 331. Through slot; 34. Abutment block; 35. Elastic member; 4. Torque sensor; 5. Workbench; 6. Support frame; 7. Press-fitting mechanism; 71. Press head; 72. Press-fitting drive member; 73. Floating joint; 74. Press rod; 8. Lifting mechanism; 81. Mounting seat; 82. Lifting drive member; 83. Lifting frame; 831. First connecting plate; 832. Connecting rod; 833. Second connecting plate; 9. Rotating mechanism; 91. Turntable; 92. Limiting member; 93. Rotating drive member; 10. Moving drive member. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of 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 should fall within the scope of protection of the present invention.

[0031] Reference Figure 1 and Figure 2 The nut locking device in one embodiment of the present invention includes a mounting frame 1, a driving mechanism 2 fixed to the mounting frame 1, and a locking mechanism 3 connected to the driving mechanism 2; the driving mechanism 2 includes a driving shaft 21 that can be driven to rotate, and the locking mechanism 3 includes a transmission shaft and a locking assembly connected to the transmission shaft, and the locking assembly is used to provide torque to the nut; wherein a torque sensor 4 for detecting the torque value is connected between the driving shaft 21 and the transmission shaft.

[0032] Reference Figure 2 The driving mechanism 2 also includes a locking drive member 22 installed on the mounting frame 1 and a transmission member 23 connecting the locking drive member 22 and the driving shaft 21. In this embodiment, the locking drive member 22 uses a servo motor, and the locking drive member 22 is installed on the side of the driving shaft 21. The transmission member 23 includes a gear and a chain that transmits and connects the driving shaft 21 and the output end of the locking drive member 22. When the output end of the locking drive member 22 rotates, the driving shaft 21 can be driven to rotate through the transmission member 23, and then the transmission shaft can be driven to rotate, so that the locking assembly provides torque to the nut. Among them, the locking drive member 22 is installed on the side of the driving shaft 21 to facilitate the installation of other structures.

[0033] Reference Figure 3 and Figure 4 The locking assembly includes a housing 31, a first gear 32 and a second gear 33 rotatably mounted in the housing 31; the transmission shaft is in transmission connection with the first gear 32, the first gear 32 is in transmission connection with the second gear 33, and the second gear 33 is provided with a through groove 331 for accommodating a nut, and the groove wall of the through groove 331 can engage with the outer peripheral wall of the nut.

[0034] In this embodiment, the first gear 32 is a spline gear. The cross-sectional shape of the transmission shaft matches the spline gear and is inserted into the spline gear. This allows the transmission shaft to effectively drive the first gear 32 to rotate, which in turn drives the second gear 33 to rotate. When a nut is placed in the through-slot 331 of the second gear 33, it provides torque to the nut, allowing it to lock onto the screw, completing the connection between the workpieces. It is understood that at least one gear can be provided between the first gear 32 and the second gear 33 for transmission.

[0035] Among them, reference Figure 2 During the operation of the drive mechanism 2 and the locking mechanism 3, the torque sensor 4 can monitor and obtain the torque value in real time, thereby accurately controlling the magnitude of the locking force and ensuring an effective connection between the workpieces. In this embodiment, the torque sensor 4 and the driving shaft 21 and the driven shaft are all connected via a coupling.

[0036] Reference Figure 3 and Figure 4 The housing 31 is movably mounted on the mounting bracket 1. An abutment block 34 is fixedly connected to the outer periphery of the transmission shaft. An elastic member 35 is disposed between the abutment block 34 and the housing 31. When the locking assembly approaches the nut, the elastic member 35 is compressed to release the elastic potential energy that allows the second gear 33 to fit around the nut. In this embodiment, the elastic member 35 can be a compression spring, which is disposed around the outer periphery of the transmission shaft and between the abutment block 34 and the housing 31. When the second gear 33 approaches the nut of the workpiece to be locked, the elastic member 35 is compressed, allowing the second gear 33 to press against the nut and fit around the outer periphery of the nut.

[0037] Reference Figure 3 and Figure 4A locating pin 11 is fixed on the mounting frame 1, and a through hole 311 is provided in the shell 31. The locating pin 11 is inserted into the through hole 311, and the shell 31 can slide along the extension direction of the locating pin 11. Since different workpieces may use different types of nuts, the corresponding locking components can be replaced according to different nuts, thereby improving the adaptability of the device to nuts of different models. At the same time, when assembling different locking components to the mounting frame 1, it is only necessary to put the shell 31 on the locating pin 11 to complete the rapid disassembly and replacement of the locking components, thereby improving the convenience of operation. It can be understood that when the locking component is close to the nut, the shell 31 can move along the extension direction of the locating pin 11, so that the spring is compressed, so that the second gear 33 can be effectively put on the outer periphery of the nut.

[0038] Reference Figure 1 and Figure 5 The nut locking device of this embodiment further comprises a worktable 5 for placing a workpiece, a support frame 6 mounted on the worktable 5, and a press mechanism 7 mounted on the support frame 6. The press mechanism 7 includes a press head 71 that can be driven toward or away from the worktable 5 to press against or away from the workpiece. Therefore, when the nut locking device is in operation, the press mechanism 7 first secures the workpiece to be locked to the worktable 5, and then the nut is tightened through the cooperation of the drive mechanism 2 and the locking mechanism 3.

[0039] Reference Figure 5 and Figure 6 The press-fitting mechanism 7 also includes a press-fitting driver 72 fixed to the support frame 6, a floating joint 73 mounted at the output end of the press-fitting driver 72, and a press rod 74 connected to the floating joint 73. The press head 71 is rotatably connected to the end of the press rod 74 away from the floating joint 73 about its own axis. The press-fitting driver 72 utilizes a servo electric cylinder, which drives the press rod 74 to move, thereby driving the press head 71 to contact or move away from the workpiece on the workbench 5. The floating joint 73 can reduce the impact of eccentricity between the servo electric cylinder and the press rod 74, and the rotatable press head 71 can increase the degree of freedom of the press head 71, allowing it to adaptively adapt to the shape and structure of the workpiece.

[0040] Reference Figure 2 and Figure 7 The nut tightening device of this embodiment further includes a lifting mechanism 8 for driving the mounting frame 1 toward or away from the workbench 5. The lifting mechanism 8 includes a mounting base 81 mounted on the support frame 6, a lifting drive 82 mounted on the mounting base 81, and a lifting frame 83 connected to the output end of the lifting drive 82. The mounting frame 1 is fixedly connected to the lifting frame 83. The lifting drive 82 can also be a servo cylinder.

[0041] During operation, the lifting frame 83 is first driven downward, thereby driving the mounting frame 1 downward, so that the locking mechanism 3 engages the locking nut. When the torque sensor 4 detects that the torque value reaches a preset value, the lifting drive 82 drives the mounting frame 1 upward to move away from the nut. This allows the torque value to be precisely controlled to ensure that the locking force between the workpieces meets the required level of security.

[0042] Specifically, refer to Figure 2 The lifting frame 83 includes a first connecting plate 831 drivingly connected to the output end of the lifting drive 82, a connecting rod 832 fixedly connected to the first connecting plate 831, and a second connecting plate 833 fixedly connected to the end of the connecting rod 832 remote from the first connecting plate 831. The connecting rod 832 slidably passes through the mounting base 81, and the second connecting plate 833 is fixedly connected to the mounting frame 1. In this embodiment, multiple connecting rods 832 are provided to ensure the stability of the lifting frame 83 as it moves upward and downward.

[0043] Reference Figure 7 In an optional embodiment, the nut locking device further includes a movable drive member 10 fixedly connected to the support frame 6, and the mounting seat 81 is slidably connected to the support frame 6. The movable drive member 10 drives the mounting seat 81 to move toward or away from the pressing mechanism 7. The mounting seat 81 and the support frame 6 can be slidably connected via a slide rail, and the movable drive member 10 can be a servo electric cylinder. The movable drive member 10 can drive the mounting seat 81 to slide on the support frame 6, thereby adjusting the position of the locking mechanism 3, thereby ensuring that the locking mechanism 3 is aligned with the nut to complete the locking operation.

[0044] Reference Figure 1 In order to improve the locking efficiency of the nuts, a press-fitting mechanism 7 and at least two lifting mechanisms 8 can be installed on a support frame 6, as well as a locking mechanism 3 installed in cooperation with at least two lifting mechanisms 8, so that the locking work of at least two nuts can be completed at one time.

[0045] Reference Figure 1 In an optional embodiment, the nut locking device also includes a rotating mechanism 9 fixedly connected to the workbench 5, the rotating mechanism 9 includes a turntable 91 that can be driven to rotate around its own axis, and a limiting member 92 for fixing the workpiece to be locked is installed on the turntable 91, and the turntable 91 can be rotated to different installation positions.

[0046] Reference Figure 1 and Figure 8 The rotating mechanism 9 further includes a rotating drive member 93 fixedly connected to the workbench 5. The rotating drive member 93 is located on a side of the workbench 5 away from the support frame 6, and the output end of the rotating drive member 93 is fixedly connected to the turntable 91. The rotating drive member 93 can be a servo motor, and the limiting member 92 can be a pin.

[0047] When installing a workpiece, the workpiece is first mounted on the turntable 91 via the stopper 92, and then the nut is tightened by the locking mechanism 3. After tightening, the rotating mechanism 9 can drive the workpiece to rotate the corresponding angle to another installation position to complete the tightening of the nut in the other position, thereby improving the efficiency of nut installation.

[0048] The nut locking device of the present invention operates as follows: the workpiece to be locked is placed on a workbench 5 and pressed by a press-fitting mechanism 7. The nut is then pre-sleeved onto the screw, and the position of the mounting frame 1 is adjusted by a movable drive 10. Once adjusted, the lifting mechanism 8 lowers the mounting frame 1, and the drive mechanism 2 drives the locking mechanism 3 to tighten the nut. During the nut tightening process, a torque sensor 4 monitors the torque value in real time. When the torque value reaches the specified value, the lifting mechanism 8 drives the locking mechanism 3 away from the nut, thereby precisely controlling the nut's tightening force.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0050] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A nut locking device, characterized in that: It comprises a mounting frame (1), a driving mechanism (2) fixed to the mounting frame (1), and a locking mechanism (3) in transmission connection with the driving mechanism (2); The driving mechanism (2) includes a driving shaft (21) that can be driven to rotate, and the locking mechanism (3) includes a transmission shaft and a locking assembly that is transmission-connected to the transmission shaft, and the locking assembly is used to provide torque to the nut; wherein a torque sensor (4) for detecting a torque value is connected between the driving shaft (21) and the transmission shaft.

2. The nut locking device according to claim 1, characterized in that: The locking assembly comprises a housing (31), a first gear (32) and a second gear (33) rotatably mounted in the housing (31); the transmission shaft is in transmission connection with the first gear (32), the first gear (32) is in transmission connection with the second gear (33), and the second gear (33) is provided with a through groove (331) for accommodating a nut, and the groove wall of the through groove (331) can mesh with the outer peripheral wall of the nut.

3. The nut locking device according to claim 2, characterized in that: The housing (31) is movably mounted on the mounting frame (1); an abutment block (34) is fixedly connected to the outer periphery of the transmission shaft; an elastic member (35) is provided between the abutment block (34) and the housing (31); when the locking assembly approaches the nut, the elastic member (35) can be compressed to release elastic potential energy that enables the second gear (33) to sleeve the nut.

4. The nut locking device according to claim 3, characterized in that: A positioning pin (11) is fixed on the mounting frame (1), a through hole (311) is provided on the housing (31), the positioning pin (11) is passed through the through hole (311), and the housing (31) can slide along the extension direction of the positioning pin (11).

5. The nut locking device according to claim 1, characterized in that: The invention also includes a workbench (5) for placing a workpiece, a support frame (6) mounted on the workbench (5), and a pressing mechanism (7) mounted on the support frame (6); the pressing mechanism (7) includes a pressing head (71) that can be driven to approach or move away from the workbench (5) to resist or move away from the workpiece.

6. The nut locking device according to claim 5, characterized in that: The pressing mechanism (7) further comprises a pressing drive member (72) fixed to the support frame (6), a floating joint (73) installed at the output end of the pressing drive member (72), and a pressing rod (74) connected to the floating joint (73); the pressing head (71) is rotatably connected to an end of the pressing rod (74) away from the floating joint (73) around its own axis.

7. The nut locking device according to claim 5, characterized in that: The invention also includes a lifting mechanism (8) for driving the mounting frame (1) to move closer to or away from the workbench (5), wherein the lifting mechanism (8) includes a mounting seat (81) mounted on the support frame (6), a lifting drive member (82) mounted on the mounting seat (81), and a lifting frame (83) connected to the output end of the lifting drive member (82) in a transmission manner, and the mounting frame (1) is fixedly connected to the lifting frame (83).

8. The nut locking device according to claim 7, characterized in that: The lifting frame (83) includes a first connecting plate (831) that is transmission-connected to the output end of the lifting drive member (82), a connecting rod (832) fixedly connected to the first connecting plate (831), and a second connecting plate (833) fixedly connected to an end of the connecting rod (832) away from the first connecting plate (831); the connecting rod (832) is slidably arranged on the mounting seat (81), and the second connecting plate (833) is fixedly connected to the mounting frame (1).

9. The nut locking device according to claim 7, characterized in that: It also includes a movable driving member (10) fixedly connected to the support frame (6), the mounting seat (81) is slidably connected to the support frame (6), and the movable driving member (10) drives the mounting seat (81) to move toward or away from the pressing mechanism (7).

10. The nut locking device according to claim 5, characterized in that: The invention also includes a rotating mechanism (9) fixedly connected to the workbench (5), wherein the rotating mechanism (9) includes a turntable (91) that can be driven to rotate around its own axis, and a limiting member (92) for fixing a workpiece to be locked is installed on the turntable (91), and the turntable (91) can be rotated to different installation positions.

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