A pipe clamping mechanism

Abstract

The invention discloses a pipe clamping mechanism. It includes a clamping assembly and a locking assembly. The clamping assembly includes an upper die seat and a lower die seat. The locking assembly is arranged at the opening and closing end of the lower die seat. The travel switch is used to monitor the opening and closing state of the upper die seat. The limit mechanism includes a limit plate, a limit column and an adjusting screw. The lock tongue mechanism includes a lock tongue. The lock tongue slides between the limit column and the adjusting screw of the limit mechanism. The rear end of the lock tongue is vertically hinged with the cylinder transmission shaft and is simultaneously hinged with the rotating arm. The opening and closing movement of the lock tongue of the mechanism of the invention adopts a structure that is vertically hinged with the transmission shaft and is simultaneously hinged with the rotating arm, and moves in an adjustable limit mechanism. When the lock tongue is opened, due to the vertical transmission structure, the front end of the lock tongue adopts a lifting movement mode, which avoids the jumping movement that occurs in the conventional backward opening, and the opening and releasing is stable and safe; the lock tongue moves in the limit mechanism, and the locking state of the lock tongue can be adjusted by adjusting the adjusting screw, which is more convenient for locking and fixing different pipes.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical design, in particular to the technical field of fastening device design, and particularly relates to the design of a pipe clamping mechanism. Background Art

[0002] Pipe fittings are usually fixed by clamping two mold assemblies together. After clamping, the upper and lower mold assemblies are also locked to lock the pipe fittings. In existing clamping mechanisms, manual operations are mostly used, including pipe fitting placement, clamping of the clamping mold assembly, and locking of the mold assembly. The operation process has safety risks and pipe fittings are damaged due to the inability to accurately control the locking. At the same time, after the existing locking mechanism adopts an automatic locking structure, the clamping mold assembly often jumps out due to the opening of the lock tongue, which poses an operational safety risk. Summary of the invention

[0003] The present invention discloses a pipe clamping mechanism in view of the deficiencies of the prior art. The purpose of the present invention is to provide a pipe clamping mechanism with more convenient pipe clamping operation and more stable and reliable locking device.

[0004] The present invention is achieved through the following technical solutions:

[0005] The pipe clamping mechanism includes a clamping assembly and a locking assembly. The clamping assembly includes an upper die seat and a lower die seat for clamping and fixing the pipe. The upper die seat can be opened and closed and rotated around a rotating shaft. The locking assembly is arranged at the opening and closing end of the lower die seat and includes:

[0006] The travel switch arranged on the lower die base is used to monitor the opening and closing state of the upper die base. When the upper die base and the lower die base are closed, the monitoring head of the travel switch contacts the upper die base and sends a closing signal;

[0007] The limiting mechanism arranged on the lower die base includes: a limiting plate for supporting and fixing on the lower die base, a limiting column is arranged at the lower part of the limiting plate, and an adjustable and retractable adjusting screw is arranged at the upper part;

[0008] The locking tongue mechanism arranged on the base of the lower die seat includes: a locking tongue used to cooperate with the step of the upper die seat to realize the locking of the upper die seat, the locking tongue slides between the limiting column and the adjusting screw of the limiting mechanism, the rear end of the locking tongue is vertically hinged to the cylinder drive shaft and is also hinged to the rotating arm, the rear end of the rotating arm is hinged to the locking tongue seat fixed on the base of the lower die seat; the cylinder is fixed on the base of the lower die seat.

[0009] The cross-section of the lock tongue is a rectangular structure, and the front end cooperates with the step surface of the upper die seat to fix the upper die seat after clamping. The cross-section of the lock tongue is a variable diameter structure, the front cross-sectional diameter is smaller than the rear cross-sectional diameter, and the variable diameter position of the variable diameter structure is arranged between the limit column and the adjusting screw of the limit mechanism when the lock tongue extends forward and the upper die seat is locked.

[0010] Furthermore, a counterweight fixed by an outwardly extending connecting rod is provided on the outer end wall of the upper die base at the hinged end of the upper die base and the lower die base.

[0011] The upper die base rotating shaft is hingedly connected to the lower die base through two rotating shaft fixing plates at both ends of the rotating shaft.

[0012] The closed end interfaces of the upper die base and the lower die base are provided with a matching step combination structure.

[0013] A handle for opening and closing is arranged on the outer side of the closed end of the upper die seat.

[0014] During the opening and closing movement, the present invention, in addition to the upper die seat, only the counterweight and the handle device perform rotational movement, and there are no extra moving parts. Due to the simple configuration and reliable structure, an extremely low failure rate can be achieved, effectively reducing the failure and maintenance time of the equipment, and at the same time greatly improving the working stability of the clamping mechanism; the clamping mechanism of the present invention clamps the workpiece through the upper and lower dies to ensure the clamping performance, and only completes the pre-compression through the reciprocating movement of the lock tongue, without excessive and complex motion mechanisms and electrical equipment, so as to achieve low cost; at the same time, the device has a simple structure and an extremely low failure rate, making the later use and maintenance costs of the device even lower; the clamping mechanism has low requirements on the operator: the operator can issue a command to release the lock tongue through the button on the handle, and after the lock tongue is released, the handle can be pushed to open and close the upper die seat to complete the workpiece The pick-up and placement of the workpiece is controlled by a rear counterweight structure, and the force required to push the upper die seat is very small. After the upper die seat is closed and put into place, the sensor sends a lock tongue locking command. Anyone can easily and independently complete this series of operations, and it has strong adaptability. The clamping mechanism has a wide range of specifications for clamping workpieces. Usually, when clamping larger workpieces, the locking force used can reach several times the minimum locking force. The lock tongue of the device is a direct structure for the locking force. It is fully enclosed and hidden in the lower die seat, and there is no exposed moving parts. The combination of electrical and pneumatic components realizes the automation of the lock tongue movement, avoiding contact between personnel and the lock tongue during movement, and the safety of the device is improved.

[0015] The invention has convenient, stable and reliable opening and closing operations; the opening and closing movement of the lock tongue of the invention adopts a structure that is vertically hinged with the transmission shaft and the rotating arm at the same time, and moves in an adjustable limiting mechanism, and the structure is safe to open and close; when the lock tongue is opened, due to the vertical transmission structure, the front end of the lock tongue adopts a lifting movement mode, which avoids the jumping movement that occurs in the conventional backward opening, and the opening and releasing is stable and safe; because the lock tongue moves in the limiting mechanism, the locking state of the lock tongue can be adjusted by adjusting the adjusting screw, which is more convenient for locking and fixing different pipe fittings; the structure of the invention is reliable, the failure rate is low, the adaptability is strong, the stability is high, and the safety is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the device;

[0017] Figure 2 A schematic diagram of the locking and locking tongue components of the device after the workpiece is removed;

[0018] Figure 3 A three-dimensional schematic diagram of the device.

[0019] The description of the accompanying drawings is as follows:

[0020] 1—cylinder, 2—rotating shaft fixing plate, 3—counterweight, 4—rotating shaft assembly, 5—pipe fitting, 6—handle, 7—locking assembly protection cover, 8—travel switch, 9—lock tongue seat, 10—lower die seat, 11—upper die seat, 12—limit plate, 13—adjusting screw, 14—lock tongue, 15—limit column, 16—rotating arm, 17—rotating shaft, 18—transmission shaft. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0022] Combined with the attached pictures.

[0023] The pipe clamping mechanism includes a clamping assembly and a locking assembly. The clamping assembly includes an upper die seat 11 and a lower die seat 10 for clamping and fixing the pipe. The upper die seat 11 can be opened and closed and rotated around a rotating shaft. The locking assembly is arranged at the opening and closing end of the lower die seat 10, and includes:

[0024] The travel switch 8 disposed on the lower die base 10 is used to monitor the opening and closing state of the upper die base 11. When the upper die base 11 and the lower die base 10 are closed, the monitoring head of the travel switch 8 is pressed into contact with the upper die base 11 and sends a closing signal;

[0025] The limiting mechanism arranged on the lower die base 10 includes: a limiting plate 12 for supporting and fixing on the lower die base, a limiting column 15 is arranged at the lower part of the limiting plate 12, and an adjustable and retractable adjusting screw 13 is arranged at the upper part;

[0026] The locking tongue mechanism arranged on the base of the lower die base 10 includes: a locking tongue 14 used to cooperate with the step of the upper die base 11 to realize the locking of the upper die base 11, the locking tongue 14 slides between the limiting column 15 of the limiting mechanism and the adjusting screw 13, the rear end of the locking tongue 14 is vertically hinged to the transmission shaft 18 of the cylinder 1 and is also hinged to the rotating arm 16, the rear end of the rotating arm 16 is hinged to the locking tongue base 9 fixed on the base of the lower die base 10; the cylinder 1 is fixed on the base of the lower die base 10.

[0027] The cross-section of the locking tongue 14 is a rectangular structure, and the front end cooperates with the step surface of the upper die seat 11 to fix the upper die seat 11 after clamping. The cross-section of the locking tongue 14 is a variable diameter structure, the front cross-sectional diameter is smaller than the rear cross-sectional diameter, and the variable diameter position of the variable diameter structure is arranged between the limit column 15 of the limit mechanism and the adjusting screw 13 when the locking tongue 14 extends forward and the upper die seat 11 is locked.

[0028] The outer end wall of the upper die base 11 at the hinged end of the upper die base 11 and the lower die base 10 is provided with a counterweight 3 fixed by an outwardly extending connecting rod.

[0029] The rotation axis of the upper die base 11 is hingedly connected to the lower die base 10 through two rotation axis fixing plates 2 at both ends of the rotation axis.

[0030] The closed end interfaces of the upper die base 11 and the lower die base 10 are provided with a matching step connection structure.

[0031] A handle 6 for opening and closing is provided on the outer side of the closed end of the upper die seat 11 .

[0032] As shown in the figure, the device includes a clamping assembly and a locking assembly that rotate relative to each other; the clamping assembly includes an upper die base 11, a lower die base 10, a rotating shaft assembly 4, a counterweight 3 and a handle 6, and the upper die base 11 rotates around the rotating shaft of the rotating shaft assembly 4 to realize the opening and closing of the mechanism to complete the clamping or release of the pipe 5; the locking assembly includes a travel switch 8, a lock tongue seat 9, an adjusting screw 13, a lock tongue 14, a limit column 15, a rotating arm 16, a rotating shaft 17, a transmission shaft 18 and a cylinder 1.

[0033] The lower die base 10 can be set on any platform, and after the upper die base 11 is assembled with the rotating shaft fixing plate and the rotating shaft assembly 4, the upper die base 11 can open and close around the rotating shaft. After adding the counterweight, the opening and closing resistance is much smaller than the gravity of the upper die base 11.

[0034] After the upper die seat 11 is closed, the travel switch 8 collects the position signal of the upper die seat 11, and then sends a locking signal to the valve of the control cylinder. At this time, the cylinder 1 pushes the lock tongue 14 upward and extends it under the push of the rotating arm 16 to perform a locking movement. The lock tongue 14 moves between the limit column 15 and the adjusting screw 13. Due to the adjustment of the adjusting screw 13, the locking force can be controlled to avoid overloading the locking force of the lock tongue 14 and clamping the pipe 5. The cylinder 1 assembly uses the factory air source, and at the same time, it has its own pressure feedback control to ensure that the locking is continuous and effective.

[0035] When the locking is completed, just press the action switch on the handle to send out an unlocking signal. At this time, the cylinder 1 acts in the opposite direction, pulling the lock tongue 14 backward to cause the unlocking movement. Due to the stroke control of the cylinder 1 and the torque coordination of the lock tongue 14 assembly, the unlocking movement of the lock tongue 14 is controllable and will not move too much to damage the device or the workpiece.

[0036] By adjusting the limit position of the adjusting screw 13, workpieces of various specifications can be clamped. After the position of the adjusting screw 13 is correct, press the button on the handle 6 to send a retraction command to the cylinder 1, and the cylinder transmits the movement to the lock tongue 14 through the transmission shaft 18 and the rotating arm 16, and the lock tongue 14 produces a retreating loosening movement. After the lock tongue 14 is loosened, push the handle 6 to drive the upper die seat 11 to rotate around the rotating shaft assembly 4 and open, and keep it open through the counterweight 3. After the workpiece is placed, the installation and locking of the workpiece can be completed by the reverse operation of the above content, and the operation method remains unchanged when the workpiece is removed.

[0037] After the implementation of this device, the opening and closing efficiency of the mold base is greatly improved, and the movement is reliable, the work efficiency can be steadily improved, and the safety of the device operation is further improved.

Claims

1. A pipe clamping mechanism, comprising a clamping assembly and a locking assembly, wherein the clamping assembly comprises an upper die seat and a lower die seat for clamping and fixing the pipe, and the upper die seat can be opened and closed and rotated around a rotating shaft, characterized in that: The locking assembly is arranged at the opening and closing end of the lower die base, and includes: The travel switch arranged on the lower die base is used to monitor the opening and closing state of the upper die base. When the upper die base and the lower die base are closed, the monitoring head of the travel switch contacts the upper die base and sends a closing signal; The limiting mechanism arranged on the lower die base includes: a limiting plate for supporting and fixing on the lower die base, a limiting column is arranged at the lower part of the limiting plate, and an adjustable and retractable adjusting screw is arranged at the upper part; The locking tongue mechanism arranged on the base of the lower die seat comprises: a locking tongue used to cooperate with the step of the upper die seat to realize the locking of the upper die seat, the locking tongue slides between the limiting column and the adjusting screw of the limiting mechanism, the rear end of the locking tongue is vertically hinged with the cylinder transmission shaft and is also hinged with the rotating arm, the rear end of the rotating arm is hinged with the locking tongue seat fixed on the base of the lower die seat; the cylinder is fixed on the base of the lower die seat; The cross-section of the lock tongue is a rectangular structure, and the front end cooperates with the step surface of the upper die seat to fix the upper die seat after clamping. The cross-section of the lock tongue is a variable diameter structure, the front cross-sectional diameter is smaller than the rear cross-sectional diameter, and the variable diameter position of the variable diameter structure is arranged between the limit column and the adjusting screw of the limit mechanism when the lock tongue extends forward and the upper die seat is locked.

2. The pipe clamping mechanism according to claim 1, characterized in that: The outer end wall of the upper die seat at the hinged end of the upper die seat and the lower die seat is provided with a counterweight fixed by an outwardly extending connecting rod.

3. The pipe clamping mechanism according to claim 2, characterized in that: The upper die base rotating shaft is hingedly connected to the lower die base through two rotating shaft fixing plates at both ends of the rotating shaft.

4. The pipe clamping mechanism according to claim 2, characterized in that: The closed end interfaces of the upper die base and the lower die base are provided with a matching step combination structure.

5. The pipe clamping mechanism according to claim 2, characterized in that: A handle for opening and closing is arranged on the outer side of the closed end of the upper die seat.

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