Self-locking and positioning connection device

Abstract

The present invention relates to a connection device capable of self-locking and positioning, which includes a self-locking seat and a receiving seat that is movably matched with the self-locking seat. A self-locking mechanism is installed between the receiving seat and the self-locking seat; when the self-locking seat approaches or moves away from the receiving seat, the self-locking mechanism connects and positions the self-locking seat and the receiving seat; the receiving seat includes a cylindrical main body, an adjusting screw, a tension spring, an upper end plate and a lower end plate. An upper end plate is installed at the upper end of the cylindrical main body, and a tapered hole is provided in the middle of the upper end plate. A lower end plate is installed at the lower end of the cylindrical main body. The advantages of the present invention are: The self-locking device is installed between two adjacent telescopic arms of the present invention, with reasonable structure, convenient operation and reduced cost. Especially the setting of the self-locking device and the improvement of the self-locking seat and the receiving seat achieve the effects of safety, reliability and convenient maintenance in the hoisting field.

Description

Technical Field

[0001] The present invention relates to a connection device with self-locking positioning, which is used in the hoisting field. Background Art

[0002] Some of the existing telescopic booms adopt the linkage of telescopic cylinders and steel wires to achieve synchronous telescoping of multi-stage boom arms. The working principle is simple and the speed is fast. However, since there is no locking device between adjacent arms, there are unstable factors during operation, and it is difficult to arrange inside the device, with complex operation and inconvenient maintenance. Summary of the Invention

[0003] To overcome the defects of the prior art, the present invention provides a connection device with self-locking positioning. The technical solution of the present invention is as follows:

[0004] The connection device with self-locking positioning includes a self-locking seat and a receiving seat that is movably matched with the self-locking seat. A self-locking mechanism is installed between the receiving seat and the self-locking seat; when the self-locking seat approaches or moves away from the receiving seat, the self-locking mechanism connects and positions the self-locking seat and the receiving seat; the receiving seat includes a cylindrical main body, an adjusting screw, a tension spring, an upper end plate and a lower end plate. An upper end plate is installed at the upper end of the cylindrical main body, and a conical hole is opened in the middle of the upper end plate. A lower end plate is installed at the lower end of the cylindrical main body, and a central hole with a stepped cross-section is opened at the center of the lower end plate. The screw part of the adjusting screw passes through the central hole and is installed with an adjusting nut, and the screw part is in threaded cooperation with the central hole. The screw head part of the adjusting screw is limited by the central hole; the tension spring is arranged in the vertical direction, one end of the tension spring is connected to the adjusting nut, and the other end is connected to the self-locking seat.

[0005] The self-locking seat includes a cross-shaped main body. A connecting protrusion is arranged on the upper end surface of the cross-shaped main body, and a conical protrusion that is slidably matched with the conical hole is arranged on the lower end surface; the other end of the tension spring is connected to the reduced end surface of the conical protrusion; positioning groove groups are opened on the side surface of the conical protrusion, and the two positioning groove groups are symmetrically arranged along the conical protrusion. Each positioning groove group includes an upper positioning groove and a lower positioning groove corresponding to the upper positioning groove. The upper positioning groove is located in the upper part of the side surface of the conical protrusion, and the lower positioning groove is located in the lower part of the side surface of the conical protrusion.

[0006] The described self-locking mechanism includes two self-locking units installed in the receiving seat. The two self-locking units are symmetrically arranged in the receiving seat. Each self-locking unit includes a self-locking gear shaft, a self-locking gear, an upper clamping block, a lower clamping block, and a rocker. The self-locking gear shaft is rotatably installed in the receiving seat. A self-locking gear is installed in the middle of the self-locking gear shaft. The rocker passes through the self-locking gear shaft and is perpendicular to the self-locking gear shaft. A clamping nut is threadedly connected to the rocker on both sides of the self-locking gear shaft, and the two clamping nuts clamp the gear shaft. An upper clamping block is installed at the upper end of the rocker, and a lower clamping block is installed at the lower end. The upper clamping block is in movable fit with the upper positioning groove, and the lower clamping block is in movable fit with the lower positioning groove. The self-locking gear is driven by a power mechanism.

[0007] The described power mechanism includes a motor installed on the receiving seat. A driving gear is installed on the rotating shaft of the motor, and the driving gear meshes with the self-locking gear.

[0008] The butt joint surface between the receiving seat and the self-locking seat is arranged in a stepped shape, and a rubber pad is installed at the butt joint of the receiving seat and the self-locking seat.

[0009] The upper clamping block and the lower clamping block have the same structure and are integrally arranged in a wedge shape.

[0010] The upper positioning groove is adapted to the upper clamping block, and the lower positioning groove is adapted to the lower clamping block.

[0011] The flared end of the tapered hole on the upper end plate is close to the self-locking seat, and the constricted end is located below the flared end and far from the self-locking seat.

[0012] The advantages of the present invention are as follows: The self-locking device is installed between adjacent telescopic arms of the present invention, with reasonable structure, convenient operation, and reduced cost. In particular, the setting of the self-locking device and the improvement of the self-locking seat and the receiving seat achieve the effects of safety, reliability, and convenient maintenance in the hoisting field. Brief Description of the Drawings

[0013] Figure 1 is a schematic diagram of the main structure of the present invention.

[0014] Figure 2 is Figure 1 a schematic diagram of the structure of the receiving seat (including the self-locking mechanism) in

[0015] Figure 3 is Figure 1 a schematic diagram of the structure of the self-locking seat in Detailed Description of the Invention

[0016] The present invention will be further described below in conjunction with specific embodiments, and the advantages and features of the present invention will become clearer with the description. However, these embodiments are merely exemplary and do not constitute any limitation to the scope of the present invention. Those skilled in the art should understand that without departing from the spirit and scope of the present invention, modifications or substitutions can be made to the details and forms of the technical solutions of the present invention, but such modifications and substitutions all fall within the protection scope of the present invention.

[0017] Referring to Figures 1 to 3 , the present invention relates to a connection device capable of self-locking and positioning, including a self-locking seat 1 and a receiving seat 2 that is movably matched with the self-locking seat 1. A self-locking mechanism is installed between the receiving seat 2 and the self-locking seat 1; when the self-locking seat 1 approaches or moves away from the receiving seat 2, the self-locking mechanism connects and positions the self-locking seat 1 and the receiving seat 2; the receiving seat 2 includes a cylindrical main body, an adjusting screw 25, a tension spring 24, an upper end plate 27, and a lower end plate 21. An upper end plate 27 is installed at the upper end of the cylindrical main body, and a conical hole 23 is opened in the middle of the upper end plate. A lower end plate 21 is installed at the lower end of the cylindrical main body, and a central hole 22 with a stepped cross-section is opened at the center of the lower end plate 21. The screw part of the adjusting screw 25 passes through the central hole and is installed with an adjusting nut 26, and the screw part is threadedly matched with the central hole 22, and the screw head part of the adjusting screw 25 is limited by the central hole; the tension spring 24 is arranged in the vertical direction, one end of the tension spring 24 is connected to the adjusting nut 26, and the other end is connected to the self-locking seat 1.

[0018] The self-locking seat 1 includes a cross-shaped main body. A connecting protrusion 11 is arranged on the upper end surface of the cross-shaped main body, and a conical protrusion 12 that is slidably matched with the conical hole is arranged on the lower end surface; the other end of the tension spring 24 is connected to the reduced end surface of the conical protrusion 12; positioning groove groups are opened on the side surface of the conical protrusion 12, and the two positioning groove groups are symmetrically arranged along the conical protrusion 12. Each positioning groove group includes an upper positioning groove 13 and a lower positioning groove 14 corresponding to the upper positioning groove 13. The upper positioning groove 13 is located in the upper part of the side surface of the conical protrusion 12, and the lower positioning groove 14 is located in the lower part of the side surface of the conical protrusion 12.

[0019] As Figure 2As shown in the figure, the self-locking mechanism includes two self-locking units installed in the receiving seat. The two self-locking units are symmetrically arranged in the receiving seat 2. Each self-locking unit includes a self-locking gear shaft 32, a self-locking gear 33, an upper clamping block 35, a lower clamping block 36 and a rocker 34. The self-locking gear shaft 32 is rotatably installed in the receiving seat 2. A self-locking gear 33 is installed in the middle of the self-locking gear shaft 32. The rocker 34 passes through the self-locking gear shaft 32 and is perpendicular to the self-locking gear shaft 32. Clamping nuts are respectively threadedly connected to the rockers on both sides of the self-locking gear shaft 32. The two clamping nuts clamp the gear shaft to fix the rocker; an upper clamping block 35 is installed at the upper end of the rocker 34, and a lower clamping block 36 is installed at the lower end; the upper clamping block 35 is in moving fit with the upper positioning groove 13, and the lower clamping block 36 is in moving fit with the lower positioning groove 14; the self-locking gear 33 is driven by a power mechanism.

[0020] The power mechanism includes a motor (not shown) installed on the receiving seat. A driving gear is installed on the rotating shaft of the motor, and the driving gear meshes with the self-locking gear.

[0021] The butt joint surface of the receiving seat 2 and the self-locking seat 1 is arranged in a stepped shape. A rubber pad is installed at the butt joint of the receiving seat and the self-locking seat to play a buffering role.

[0022] The upper clamping block 35 and the lower clamping block 36 have the same structure and are integrally arranged in a wedge shape.

[0023] The upper positioning groove 13 is adapted to the upper clamping block 35, and the lower positioning groove 14 is adapted to the lower clamping block 36.

[0024] The flared end of the tapered hole on the upper end plate is close to the self-locking seat 1, and the constricted end is located below the flared end and away from the self-locking seat 1.

[0025] The working principle of the present invention is as follows: When the two-stage telescopic arm extends, the self-locking seat on one telescopic arm moves away from the receiving seat installed on the other telescopic arm. At this time, the tapered protrusion on the self-locking seat pulls the tension spring, and the tension spring plays a buffering role when the self-locking seat moves. When the self-locking seat moves away from the receiving seat to a predetermined position, the motor rotates at this time. The driving gear on the motor shaft rotates to drive the self-locking gear to rotate. The rocker installed on the self-locking gear shaft deflects clockwise, and the upper clamping block is embedded in the upper positioning groove, realizing the positioning of the self-locking seat; conversely, when the self-locking seat moves downward and approaches the receiving seat, the motor shaft rotates in reverse, causing the upper clamping block to move away from the upper positioning groove, and the self-locking seat moves downward. When it moves to the preset position, the rocker installed on the self-locking gear shaft deflects counterclockwise, and the lower clamping block is embedded in the lower positioning groove, realizing the positioning of the self-locking seat.

Claims

1. A connective device capable of self-locking and positioning, characterized in that It includes a self-locking seat and a receiving seat that is movably fitted with the self-locking seat, and a self-locking mechanism is installed between the receiving seat and the self-locking seat; when the self-locking seat approaches or moves away from the receiving seat, the self-locking mechanism connects and positions the self-locking seat and the receiving seat; the receiving seat includes a cylindrical main body, an adjusting screw, a tension spring, an upper end plate and a lower end plate. An upper end plate is installed at the upper end of the cylindrical main body, and a conical hole is provided in the middle of the upper end plate. A lower end plate is installed at the lower end of the cylindrical main body, and a central hole with a stepped cross-section is provided at the center of the lower end plate. The self-locking seat includes a cross-shaped main body. A connecting protrusion is provided on the upper end surface of the cross-shaped main body, and a conical protrusion that is slidably fitted with the conical hole is provided on the lower end surface; a positioning groove group is provided on the side surface of the conical protrusion, and the two positioning groove groups are symmetrically arranged along the conical protrusion. Each positioning groove group includes an upper positioning groove and a lower positioning groove corresponding to the upper positioning groove. The upper positioning groove is located in the upper part of the side surface of the conical protrusion, and the lower positioning groove is located in the lower part of the side surface of the conical protrusion. The self-locking mechanism includes two self-locking units installed in the receiving seat. The two self-locking units are symmetrically arranged in the receiving seat. Each self-locking unit includes a self-locking gear shaft, a self-locking gear, an upper clamping block, a lower clamping block and a rocker. The self-locking gear shaft is rotatably installed in the receiving seat, and a self-locking gear is installed in the middle of the self-locking gear shaft. The rocker passes through the self-locking gear shaft and is perpendicular to the self-locking gear shaft. Clamping nuts are respectively threadedly connected to the rocker on both sides of the self-locking gear shaft, and the two clamping nuts clamp the gear shaft; an upper clamping block is installed at the upper end of the rocker, and a lower clamping block is installed at the lower end; the upper clamping block is movably fitted with the upper positioning groove, and the lower clamping block is movably fitted with the lower positioning groove.

2. The self-locking positioning connection device according to claim 1, characterized in that The screw part of the adjusting screw passes through the central hole and is installed with an adjusting nut, and the screw part is threadedly fitted with the central hole. The screw head part of the adjusting screw is limited by the central hole; the tension spring is arranged in the vertical direction. One end of the tension spring is connected to the adjusting nut, and the other end is connected to the self-locking seat; the other end of the tension spring is connected to the reduced diameter end surface of the conical protrusion.

3. The self-locking positioning connection device according to claim 2, characterized in that, The self-locking gear is driven by a power mechanism. The power mechanism includes a motor installed on the receiving seat. A driving gear is installed on the rotating shaft of the motor, and the driving gear meshes with the self-locking gear.

4. The self-locking and positionable connecting device according to claim 1 or 3, characterized in that The butt joint surface of the receiving seat and the self-locking seat is provided with a stepped shape, and a rubber pad is installed at the butt joint of the receiving seat and the self-locking seat.

5. The connective device capable of self-locking and positioning according to claim 1, characterized in that, The upper clamping block and the lower clamping block have the same structure and are integrally wedge-shaped.

6. The self-locking positioning connection device according to claim 5, characterized in that, The upper positioning groove is adapted to the upper clamping block, and the lower positioning groove is adapted to the lower clamping block.

7. The self-locking and positionable connecting device according to claim 1, wherein The flared end of the conical hole on the upper end plate is close to the self-locking seat, and the reduced diameter end is located below the flared end and away from the self-locking seat.

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