A threaded connection device capable of automatically aligning and locking

Abstract

The utility model discloses an automatic alignment and locking threaded connection device, comprising a bolt assembly and a floating nut assembly connected to the bolt assembly; the bolt assembly comprises a motor, a housing, a sleeve shaft, a cover, a nut, an elastic member and a ball bolt; the device drives the sleeve shaft to rotate through the motor and the nut and the elastic member, so that the ball bolt is fed and rotated relative to the sleeve shaft axis direction; when the ball bolt encounters resistance, if the thread of the ball bolt and the floating nut assembly are not aligned, the resistance will overcome the elastic force of the elastic member to make the nut and the ball bolt retreat, and the ball bolt is aligned with the thread of the floating nut assembly when retreating, and the ball bolt only needs to be fed and screwed into the thread of the floating nut assembly, thereby realizing automatic alignment and locking of the threaded connection device. The threaded connection device has high mobility, simple and compact structure, strong applicability, and no special requirements for the processing, assembly and control of parts.

Description

Technical Field

[0001] The utility model relates to a threaded connection device, in particular to an automatic aligning and locking threaded connection device. Background Art

[0002] At present, the threaded connection and tightening of bolts and nuts are mostly carried out by manual assembly by assemblers. For automated systems or occasions that require repeated disassembly and connection, manual assembly is time-consuming and labor-intensive and very inconvenient. At the same time, in actual production environments, assemblers often reduce the efficiency of threaded connection and tightening because the bolts cannot be quickly aligned with the nuts. For example, during the erection and withdrawal of radar antennas, the antenna side blocks need to be connected and fixed during erection, and the antenna side blocks need to be disassembled during withdrawal to achieve the transportation state. There are several connection points between the antenna side blocks that require threaded connection and tightening of bolts and nuts. If it is completely completed by manual assembly by assemblers, it will take a long time and cannot meet the mobility requirements. At the same time, due to the different assembly habits and assembly experience of assemblers, the accuracy of threaded connection and tightening is difficult to control.

[0003] Therefore, how to provide a threaded connection device that has low assembly difficulty and is suitable for repeated disassembly and connection is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the utility model provides an automatic aligning and locking threaded connection device.

[0005] The technical solution of the utility model is as follows:

[0006] An automatically aligned and locked threaded connection device comprises a bolt assembly and a floating nut assembly connected to the bolt assembly;

[0007] The bolt assembly comprises a motor, a housing, a sleeve shaft, a cover shell, a nut, an elastic member and a ball bolt; the sleeve shaft is rotatably sleeved in the housing and connected to the motor output shaft, the cover shell is arranged on the top of the housing and forms a cavity, the nut is arranged in the cavity and is supported by the elastic member on a side away from the motor output shaft; the ball bolt is sleeved in the sleeve shaft and can make a linear motion relative to the axis direction of the sleeve shaft and can rotate synchronously with the sleeve shaft and the motor output shaft; the head end of the ball bolt passes through the sleeve shaft and the housing in turn, and passes through the cover shell after being meshed with the nut;

[0008] The bolt assembly is connected to the floating nut assembly via a ball stud.

[0009] Furthermore, the ball stud is provided with a guide key, and the sleeve shaft is provided with an axial keyway; the guide key on the ball stud cooperates with the keyway on the sleeve shaft, so that the ball stud can move linearly relative to the axial direction of the sleeve shaft and can rotate synchronously with the sleeve shaft along with the motor.

[0010] Furthermore, the sleeve shaft is rotatably sleeved in the housing via a bearing.

[0011] Furthermore, the tail end of the ball head bolt is provided with a guide shaft for guiding, and the sleeve shaft is provided with an axial inner hole adapted to the guide shaft, and the guide shaft and the inner hole are slidably matched to prevent the bolt from tilting and causing the head of the ball head bolt to swing during axial feeding.

[0012] Furthermore, it also includes a sensor control component, which includes a signal transmitting device and a signal receiving device, and the signal receiving device is connected to the motor controller; the signal transmitting device and the signal receiving device are respectively arranged on the bolt assembly and the floating nut assembly and are coaxially arranged. When the ball head bolt is connected to the floating nut, the signal receiving device receives the signal sent by the signal transmitting device, and the signal receiving device sends a motor stop signal to the motor controller.

[0013] Furthermore, a floating spring washer is provided at the position where the ball stud passes through the cover shell.

[0014] Furthermore, the elastic member is a spring.

[0015] Furthermore, the floating nut assembly includes a floating nut body and a floating shell, and the ball stud is connected to the floating nut body.

[0016] Compared with the prior art, the utility model has the following technical effects:

[0017] The utility model proposes an automatic alignment and locking threaded connection device. The device drives the rotation of the sleeve shaft by a motor and the action of the nut and the elastic member to feed and rotate the ball bolt relative to the axis direction of the sleeve shaft. When the ball bolt encounters resistance, if the thread of the ball bolt and the floating nut assembly is not aligned, that is, the ball bolt cannot be screwed into the thread of the floating nut assembly, the ball bolt cannot be fed forward, and the resistance will overcome the elastic force of the elastic member to make the nut and the ball bolt retreat. When retreating, the ball bolt is aligned with the thread of the floating nut assembly. At this time, the resistance disappears, and the ball bolt only needs to be fed and screwed into the thread of the floating nut assembly, thereby realizing the automatic alignment and locking of the threaded connection device. The threaded connection device has high mobility, simple and compact structure, strong applicability, and no special requirements for the processing, assembly, and control of parts. Compared with traditional manual assembly, the assembly method of the utility model saves time and labor, is convenient for assembly and debugging of assemblers, and is particularly suitable for occasions that require repeated disassembly and connection. At the same time, it can also effectively reduce the work intensity of assemblers and improve the assembly efficiency of assemblers.

[0018] In the threaded connection device of the utility model, the guide shaft at the tail end of the ball stud is slidably matched with the inner hole of the sleeve shaft, and the guide shaft can slide in the sleeve shaft, thereby preventing the bolt from tilting and causing the head of the ball stud to swing during the axial feeding process.

[0019] A sensor control component is also designed in the threaded connection device of the utility model. When the ball stud is connected to the floating nut, the signal receiving device receives the signal sent by the signal transmitting device, and the signal receiving device sends a motor stop signal to the motor controller. This design further improves the degree of automation of the threaded connection device.

[0020] The threaded connection device of the utility model is also provided with a floating spring washer at the position where the ball stud passes through the cover shell. The floating spring washer is designed to prevent the occurrence of biting. When the ball stud is close to being fed into place, the floating spring washer device is about to hit the parts to be connected and tightened. Due to the action of the floating spring washer, an axial force opposite to the pre-tightening force is generated on the ball stud, thereby avoiding impact on the connected parts and causing the two compressed planes to bite. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a bolt assembly in an embodiment;

[0022] Figure 2 It is a schematic diagram of assembling the middle frame and the side frame of the radar antenna in the application embodiment.

[0023] 1-motor; 2-bearing cover; 3-lower bearing; 4-ball bolt; 5-housing; 6-support; 7-nut; 8-cover; 9-stopper; 10-floating spring washer; 11-upper bearing; 12-elastic member; 13-sleeve shaft; 14-guide key; 15-guide shaft; 16-sensor control assembly; 17-antenna middle frame; 18-antenna side block frame; 19-bolt assembly; 20-floating nut assembly. DETAILED DESCRIPTION

[0024] Embodiment 1:

[0025] The utility model discloses an automatic alignment and locking threaded connection device, which is used for connecting two parts, and comprises a bolt assembly arranged on one of the parts and a floating nut assembly arranged on the other part and connected with the bolt assembly;

[0026] like Figure 1 As shown, the bolt assembly includes a motor 1, a housing 5, a sleeve shaft 13, a cover shell 8, a nut 7, an elastic member 12 and a ball bolt 4; the housing 5 is fixedly connected to the mounting flange of the motor 1, the sleeve shaft 13 is rotatably sleeved in the housing 5 and connected to the output shaft of the motor 1, the cover shell 8 is arranged on the top of the housing 5 and a cavity is formed between the cover shell 8 and the housing 5, the nut 7 is arranged in the cavity and is supported by the elastic member 12 on the side away from the output shaft of the motor 1; the ball bolt 4 is sleeved in the sleeve shaft 13 and can make a linear motion relative to the axial direction of the sleeve shaft 13 and can rotate synchronously with the sleeve shaft 13 and the output shaft of the motor 1; the head end of the ball bolt 4 passes through the sleeve shaft 13 and the housing 5 in turn, and passes through the cover shell 8 after meshing with the nut 7 (i.e., threaded fit); a stopper 9 for mechanical limit is also provided outside the cover shell.

[0027] The connection between the two components is achieved through the threaded connection between the ball stud 4 and the floating nut assembly.

[0028] When the motor 1 is turned on, the ball bolt 4 and the sleeve shaft 13 rotate synchronously with the output shaft of the motor 1. Since the ball bolt 4 is meshed with the nut 7, the nut 7 is supported in the inner cavity by the elastic member 12 and cannot rotate. Therefore, the ball bolt 4 will perform axial linear motion in the sleeve shaft 13; when the ball bolt 4 encounters resistance, if the threads of the ball bolt 4 and the floating nut assembly are not aligned, that is, the ball bolt 4 cannot be screwed into the threads of the floating nut assembly, the ball bolt 4 cannot be fed forward, and the resistance will overcome the elastic force of the elastic member 12 to cause the nut 7 and the ball bolt 4 to retreat. When the ball bolt 4 retreats, its hemispherical head will align the threads of the floating nut assembly. At this time, the resistance disappears, and the ball bolt 4 continues to feed and is screwed into the threads of the floating nut assembly, thereby realizing automatic alignment and locking of the threaded connection device.

[0029] The threaded connection device of the utility model has high mobility, simple and compact structure, strong applicability, and no special requirements for the processing, assembly, and control of parts. Compared with traditional manual assembly, the assembly method of the utility model saves time and effort, is convenient for assembly and debugging by assemblers, and is particularly suitable for occasions that require repeated disassembly and connection, effectively reducing the work intensity of assemblers and improving their assembly efficiency.

[0030] Embodiment 2:

[0031] This embodiment is further designed on the basis of the first embodiment in that: Figure 1 As shown, in this example, a guide key 14 is provided on the ball stud 4, and an axial keyway is provided on the sleeve shaft 13; the guide key 14 is arranged in the keyway and a gap is provided between the guide key 14 and the keyway for the ball stud 4 to move slightly, and the guide key 14 on the ball stud 4 cooperates with the keyway on the sleeve shaft 13, so that the ball stud 4 can make a linear motion relative to the axial direction of the sleeve shaft 13 and can rotate synchronously with the sleeve shaft 13 along with the motor 1.

[0032] Embodiment three:

[0033] This embodiment is further designed on the basis of the first embodiment in that: Figure 1 As shown, in this example, the top and bottom ends of the sleeve shaft 13 are respectively provided with a support member 6 for mounting and positioning the upper bearing 11 and a bearing cover 2 for mounting and positioning the lower bearing 3, and the sleeve shaft 13 is rotatably sleeved in the housing 5 through the bearings.

[0034] Embodiment 4:

[0035] This embodiment is further designed on the basis of the first embodiment in that: Figure 1 As shown, in this example, the tail end of the ball head bolt 4 is provided with a guide shaft 15 for guiding, and the sleeve shaft 13 is provided with an axial inner hole adapted to the guide shaft 15, and the guide shaft 15 and the inner hole are slidably fitted together, thereby preventing the bolt from tilting and causing the head of the ball head bolt 4 to swing during axial feeding.

[0036] Embodiment five:

[0037] This embodiment is further designed on the basis of the first embodiment in that: Figure 2 As shown, the automatically aligning and locking threaded connection device in this example also includes a sensor control component 16, which includes a signal transmitting device and a signal receiving device, and the signal receiving device is connected to the motor controller; the signal transmitting device and the signal receiving device are respectively arranged on the bolt assembly and the floating nut assembly and are coaxially arranged, when the ball head bolt is connected to the floating nut, the signal receiving device receives the signal sent by the signal transmitting device, and the signal receiving device sends a motor stop signal to the motor controller.

[0038] Embodiment six:

[0039] This embodiment is further designed on the basis of the first embodiment in that: Figure 1 As shown, in this example, a floating spring washer 10 is also provided at the position where the ball stud 4 passes through the housing 8. The floating spring washer 10 is designed to prevent the occurrence of bite phenomenon. When the ball stud 4 is close to being fed into place, the floating spring washer 10 device is about to hit the parts to be connected and compressed. Due to the action of the floating spring washer 10, an axial force opposite to the pre-tightening force will be generated on the ball stud 4, thereby avoiding impact on the connected parts and causing the two compressed planes to bite.

[0040] Embodiment seven:

[0041] This embodiment is further designed on the basis of the first embodiment in that: the elastic member in this embodiment is a spring.

[0042] Embodiment eight:

[0043] This embodiment is further designed on the basis of the first embodiment in that: in this embodiment, the floating nut assembly includes a floating nut and a floating housing, and the ball stud is connected to the floating nut. The floating nut body is confined in the floating housing, and its rotation is limited by the slot on the floating housing, but it is not pressed and completely fixed. The floating nut body can be slightly moved in any direction in the plane perpendicular to the nut axis in its floating housing, so as to correct the axis position deviation between the floating nut and the ball stud caused by errors in processing, assembly, etc.

[0044] Application examples:

[0045] In this example, the automatic alignment and locking threaded connection device of the utility model is used to assemble the radar antenna intermediate frame 17 and the radar antenna side block frame 18. Figure 2 As shown, the bolt assembly 19 is installed on the fixed antenna middle frame 17, and the floating nut assembly 20 is installed on the antenna side frame 18 that needs to be folded and unfolded. When the radar antenna is unfolded from the transportation state to the working state, the folded antenna side frame 18 rotates into place, and the motor of the bolt assembly 19 drives the bolt assembly to rotate. When it contacts the floating nut assembly 20 on the antenna side frame 18, it automatically aligns with the center of the nut, and the ball head bolt continues to screw into the floating nut until it is locked, so that the antenna side frame 18 is connected and fixed with the antenna middle frame 17. When it is necessary to withdraw the antenna and enter the transportation state, the motor drives the ball head bolt to rotate in the opposite direction, the ball head bolt returns to its position, and the antenna side frame is separated from the middle frame, thereby completing the splitting.

Claims

1. A threaded connection device with automatic alignment and locking, characterized in that: It comprises a bolt assembly and a floating nut assembly connected to the bolt assembly; The bolt assembly comprises a motor, a housing, a sleeve shaft, a cover shell, a nut, an elastic member and a ball bolt; the sleeve shaft is rotatably sleeved in the housing and connected to the motor output shaft, the cover shell is arranged on the top of the housing and forms a cavity, the nut is arranged in the cavity and is supported by the elastic member on a side away from the motor output shaft; the ball bolt is sleeved in the sleeve shaft and can make a linear motion relative to the axis direction of the sleeve shaft and can rotate synchronously with the sleeve shaft and the motor output shaft; the head end of the ball bolt passes through the sleeve shaft and the housing in turn, and passes through the cover shell after being meshed with the nut; The bolt assembly is connected to the floating nut assembly via a ball stud.

2. The automatic aligning and locking threaded connection device according to claim 1, characterized in that: The ball stud is provided with a guide key, and the sleeve shaft is provided with an axial keyway; the guide key on the ball stud cooperates with the keyway on the sleeve shaft, so that the ball stud can move linearly relative to the axial direction of the sleeve shaft and can rotate synchronously with the sleeve shaft along with the motor.

3. The automatic aligning and locking threaded connection device according to claim 1, characterized in that: The sleeve shaft is rotatably sleeved in the housing via a bearing.

4. The automatic aligning and locking threaded connection device according to claim 1, characterized in that: The tail end of the ball stud is provided with a guide shaft for guiding, and the sleeve shaft is provided with an axial inner hole adapted to the guide shaft, and the guide shaft and the inner hole are slidably matched to prevent the bolt from tilting and causing the head of the ball stud to swing during axial feeding.

5. The automatic aligning and locking threaded connection device according to claim 1, characterized in that: It also includes a sensor control component, which includes a signal transmitting device and a signal receiving device, and the signal receiving device is connected to the motor controller; the signal transmitting device and the signal receiving device are respectively arranged on the bolt assembly and the floating nut assembly and are coaxially arranged. When the ball head bolt is connected to the floating nut, the signal receiving device receives the signal sent by the signal transmitting device, and the signal receiving device sends a motor stop signal to the motor controller.

6. The self-aligning and locking threaded connection device according to claim 1, characterized in that: A floating spring washer is also provided at the position where the ball stud passes through the cover shell.

7. The self-aligning and locking threaded connection device according to claim 1, characterized in that: The elastic member is a spring.

8. The self-aligning and locking threaded connection device according to claim 1, characterized in that: The floating nut assembly comprises a floating nut body and a floating shell, and the ball stud is connected to the floating nut body.

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