Corner positioning type clamp

Abstract

The utility model belongs to the technical field of positioning clamps, and particularly relates to a corner positioning type clamp which comprises an oil pressure corner cylinder, a piston rod and a clamping arm, two corner limiting clamping blocks are installed on one side of the oil pressure corner cylinder, a certain included angle is formed between the two corner limiting clamping blocks, the top end of the piston rod is fixedly connected with a rectangular butt-joint block, and the top end of the piston rod is fixedly connected with the clamping arm. A butt-joint clamping groove is formed in the bottom end of the clamping arm, the rectangular butt-joint block is inserted into the inner wall of the butt-joint clamping groove, and a pressure sensor is installed in the clamping arm; connection between the clamping arms and the rectangular butt joint block is locked through the multiple limiting wedge blocks, operation is easy and convenient, a bolt fixing mode is not needed, and the situation that the machining precision is affected by bolt fixing looseness is reduced; and the pressure sensor is used for detecting looseness between the clamping arm and the rectangular butt joint block, so that the pressure sensor transmits a signal to a worker, and the worker can check and overhaul in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of positioning fixtures, and in particular relates to a corner positioning fixture. Background Art

[0002] Fixtures play an important role in the fields of mechanical processing, manufacturing and assembly. They ensure that the workpiece is in the correct position during the processing or assembly process, guarantee the processing accuracy and assembly quality, and prevent the workpiece from being displaced or loosened due to factors such as cutting force and vibration during the processing. Some workpieces need to limit the corner position during processing, so a corner positioning clamp is used. The hydraulic angle type is a common positioning clamp. The clamp drives the clamping arm to lift and rotate the angle through the piston rod. The piston rod and the clamping arm are generally connected and fixed by bolts. After long-term use of the clamp, the operation of the clamp is affected by vibration, which makes the bolts between the clamping arm and the piston rod gradually loosen, resulting in the clamping force cannot be kept constant. The workpiece may become loose during operation, affecting the processing accuracy and safety. In addition, the clamping arm presses down on the workpiece, causing the clamping arm to be subjected to a higher upward force. Under such long-term conditions, the connection between the clamping arm and the piston rod is prone to high wear. Therefore, the connection between the clamping arm and the piston rod will be worn and loose, making it easy for the clamping arm to tilt and shake when pressed down, making it difficult to make a stable positioning of the workpiece, further affecting the processing accuracy and safety. Utility Model Content

[0003] The utility model provides a corner positioning clamp, which has the characteristic of solving the problem of looseness between a clamping arm and a piston rod in the clamp affecting machining accuracy and safety.

[0004] The utility model provides the following technical scheme: it includes a hydraulic angle cylinder, a piston rod and a clamping arm, two corner limit blocks are installed on one side of the hydraulic angle cylinder, and a certain angle is formed between the two corner limit blocks. A rectangular docking block is fixedly connected to the top end of the piston rod, a docking slot is provided at the bottom end of the clamping arm, and the rectangular docking block is inserted into the inner wall of the docking slot. A pressure sensor is installed in the clamping arm, and the output end of the pressure sensor contacts the top of the rectangular docking block. A plurality of limit wedge blocks are slidably connected to the inner wall of the clamping arm, and a plurality of limit slots are provided on the side wall of the rectangular docking block. A plurality of limit wedge blocks are inserted into the corresponding inner walls of the limit slots.

[0005] Among them, a plurality of the limiting wedge blocks are each provided with a traction rope at one end, a driving ring is provided between the plurality of the traction ropes, the driving ring is rotatably connected to the top end of the clamping arm, and a U-shaped handle is fixedly connected to the top end of the driving ring.

[0006] Among them, a plurality of sliding grooves are opened in the clamping arm, one end of the limiting wedge block is fixedly connected to the limiting plate, the traction rope is fixedly connected to the side corresponding to the limiting plate, the limiting plate is slidably connected to the inner wall of the corresponding sliding groove, and a reset spring is fixedly connected to one side of the limiting plate.

[0007] Among them, a plurality of accommodating grooves are opened in the clamping arm, the inner wall of the accommodating groove is slidably connected with a lifting cover, the inner wall of the lifting cover is rotatably connected with a rotating ring, the inner side of the rotating ring is fixedly connected with a support rod, the side wall of the support rod is rotatably connected with a roller, the roller is in contact with the top end of the rectangular docking block, and a rotation sensor for detecting the roller is installed on the support rod.

[0008] Among them, several spherical rolling bodies are rotatably connected to both ends of the bottom of the rotating ring, and several of the spherical rolling bodies are slidably connected to the inner wall of the lifting cover. A compression spring is fixedly connected to the top of the lifting cover, and one end of the compression spring is fixedly connected to the inner wall of the accommodating groove.

[0009] The beneficial effects of the utility model are as follows: the connection between the clamping arm and the rectangular docking block is locked by a plurality of limit wedge blocks, the operation is simple and convenient, and there is no need to use bolt fixing, thereby reducing the situation where the bolt fixing loosens and affects the processing accuracy; the pressure sensor is used to detect the looseness between the clamping arm and the rectangular docking block, and then the pressure sensor transmits a signal to the staff, so that the staff can check it in time, reduce the need to continue to clamp and fix the subsequent workpiece in the case of looseness, which affects the quality of the workpiece and reduces losses. After maintenance, the workpiece can be stably positioned to maintain processing accuracy and safety.

[0010] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 It is a front view cross-sectional enlarged structural schematic diagram of the clamping arm and other components in the utility model;

[0013] Figure 3 for Figure 2 The enlarged schematic diagram of the middle A part;

[0014] Figure 4 for Figure 2 Enlarged schematic diagram of part B in the middle.

[0015] In the figure: 1. hydraulic angle cylinder; 11. piston rod; 111. rectangular docking block; 112. limit slot; 12. corner limit block; 2. clamping arm; 21. docking slot; 22. pressure sensor; 23. slide slot; 24. receiving slot; 3. limit wedge block; 31. traction rope; 32. drive ring; 321. U-shaped handle; 33. limit plate; 34. reset spring; 4. lifting cover; 41. rotating ring; 42. support rod; 43. roller; 44. rotation sensor; 45. spherical rolling body; 46. compression spring. DETAILED DESCRIPTION

[0016] See also Figure 1-Figure 4 The utility model provides the following technical solutions: including a hydraulic angle cylinder 1, a piston rod 11 and a clamping arm 2, two corner limit blocks 12 are installed on one side of the hydraulic angle cylinder 1, and a certain angle is formed between the two corner limit blocks 12, a rectangular docking block 111 is fixedly connected to the top of the piston rod 11, a docking slot 21 is provided at the bottom of the clamping arm 2, the rectangular docking block 111 is plugged into the inner wall of the docking slot 21, a pressure sensor 22 is installed in the clamping arm 2, and the output end of the pressure sensor 22 contacts the top of the rectangular docking block 111, a plurality of limit wedge blocks 3 are slidably connected to the inner wall of the clamping arm 2, a plurality of limit slots 112 are provided on the side wall of the rectangular docking block 111, and a plurality of limit wedge blocks 3 are plugged into the inner walls of the corresponding limit slots 112.

[0017] In this embodiment: the hydraulic corner cylinder 1 supports each component of the device. The hydraulic corner cylinder 1 controls the internal oil pressure and steering system to enable the piston rod 11 to be lifted and rotated. The piston rod 11 is installed and connected with the clamping arm 2 through the rectangular docking block 111. The piston rod 11 drives the clamping arm 2 to be lifted and rotated. When the clamping arm 2 rotates, it can make way for the workpiece so that the workpiece can fall to the position of the corner limit block 12. The hydraulic corner cylinder 1 supports the two corner limit blocks 12. The two corner limit blocks 12 engage and dock the corner positions of the workpiece to limit the horizontal position of the workpiece and prevent the workpiece from shaking. The piston rod 11 drives the clamping arm 2 Rotation allows the clamping arm 2 to rotate above the workpiece, and the clamping arm 2 is pressurized when it descends to clamp and fix the workpiece. The rectangular docking block 111 corresponds to the size and shape of the docking slot 21. The rectangular docking block 111 uses its rectangular shape to avoid rotational shaking with the clamping arm 2, thereby improving stability. When installing the clamping arm 2, the rectangular docking block 111 is inserted into the docking slot 21, and the rectangular docking block 111 contacts with several limiting wedge blocks 3 at the same time. The rectangular docking block 111 squeezes several limiting wedge blocks 3, and the limiting wedge blocks 3 contact with the rectangular docking block 111 using the inclined surface at the bottom, so that the limiting wedge blocks 3 can move away from the rectangular docking block 11 1 direction, so that the limiting wedge block 3 can be retracted to facilitate the rectangular docking block 111 to continue to slide upward, the rectangular docking block 111 passes over the limiting wedge block 3 to reach the position of the pressure sensor 22, the rectangular docking block 111 squeezes the pressure sensor 22, and the limiting wedge block 3 is inserted into the limiting card slot 112, so that a plurality of limiting wedge blocks 3 can limit the rectangular docking block 111, and then the clamping arm 2 and the piston rod 11 are installed and fixed, the operation is simple and convenient, and there is no need to use bolt fixing method, so as to avoid the situation that the bolt fixing loosens and affects the processing accuracy. The position of the rectangular docking block 111 and the clamping arm 2 is kept fixed, so that the pressure sensor 22 is subjected to torque. The squeezing force and position of the rectangular docking block 111 remain fixed. When the clamping arm 2 and the rectangular docking block 111 are worn after use, looseness occurs between the clamping arm 2 and the rectangular docking block 111. At this time, the clamping arm 2 presses down, tilts and shakes on the rectangular docking block 111, causing the squeezing position and force of the rectangular docking block 111 on the pressure sensor 22 to change, thereby enabling the pressure sensor 22 to transmit signals to the staff, allowing the staff to check in time, reducing the need to continue clamping and fixing subsequent workpieces in the event of looseness, which affects the quality of the workpiece and reduces losses. After maintenance, the workpiece can be stably positioned to maintain processing accuracy and safety.

[0018] A traction rope 31 is provided at one end of the plurality of limiting wedge blocks 3, and a driving ring 32 is provided between the plurality of traction ropes 31. The driving ring 32 is rotatably connected to the top end of the clamping arm 2, and a U-shaped handle 321 is fixedly connected to the top end of the driving ring 32; the driving ring 32 is kept flush with the top end of the clamping arm 2, and the U-shaped handle 321 protrudes for convenience of the staff to control the rotation of the U-shaped handle 321, and the U-shaped handle 321 drives the driving ring 32 to rotate, and when the driving ring 32 rotates, it pulls the plurality of traction ropes 31 synchronously, so that the traction rope 31 can pull the corresponding limiting wedge block 3 out of the limiting slot 112, thereby realizing the disassembly of the clamping arm 2 from the rectangular docking block 111, and the operation is simple and convenient.

[0019] A plurality of slide grooves 23 are provided in the clamping arm 2, one end of the limiting wedge block 3 is fixedly connected to the limiting plate 33, the traction rope 31 is fixedly connected to one side of the corresponding limiting plate 33, the limiting plate 33 is slidably connected to the inner wall of the corresponding slide groove 23, and a return spring 34 is fixedly connected to one side of the limiting plate 33; the slide groove 23 makes way for the limiting plate 33 and the return spring 34, the return spring 34 pushes the limiting plate 33, and the limiting plate 33 drives the limiting wedge block 3 to be inserted into the limiting slot 112, thereby improving the stability of the limiting wedge block 3 in limiting the clamping arm 2 on the rectangular docking block 111, and the limiting plate 33 limits the limiting wedge block 3 to prevent the limiting wedge block 3 from slipping.

[0020] A plurality of receiving grooves 24 are provided in the clamping arm 2, and a lifting cover 4 is slidably connected to the inner wall of the receiving groove 24, and a rotating ring 41 is rotatably connected to the inner wall of the lifting cover 4, and a support rod 42 is fixedly connected to the inner side of the rotating ring 41, and a roller 43 is rotatably connected to the side wall of the support rod 42, and the roller 43 contacts the top end of the rectangular docking block 111, and a rotation sensor 44 for detecting the roller 43 is installed on the support rod 42; the receiving groove 24 gives way to the lifting cover 4, the lifting cover 4 supports the rotating ring 41, the rotating ring 41 supports the support rod 42, the support rod 42 supports the roller 43, and the roller 43 and The top of the rectangular docking block 111 is in contact. After the wear between the clamping arm 2 and the rectangular docking block 111, shaking is likely to occur between the clamping arm 2 and the rectangular docking block 111, so that the clamping arm 2 can drive the roller 43 to move at the top of the rectangular docking block 111. The roller 43 uses the friction between the roller 43 and the rectangular docking block 111 to enable the roller 43 to rotate. When the roller 43 rotates, it is monitored and sensed by the rotation sensor 44, so that when there is looseness in the horizontal position between the clamping arm 2 and the rectangular docking block 111, it can be detected in time, and the rotation sensor 44 transmits signals to the staff for timely maintenance.

[0021] A plurality of spherical rolling bodies 45 are rotatably connected to both ends of the bottom of the rotating ring 41, and the plurality of spherical rolling bodies 45 are slidably connected to the inner wall of the lifting cover 4. A compression spring 46 is fixedly connected to the top of the lifting cover 4, and one end of the compression spring 46 is fixedly connected to the inner wall of the accommodating groove 24; when the sliding direction between the clamping arm 2 and the rectangular docking block 111 changes, the roller 43 can rotate to cope with sliding in different directions. When the roller 43 drives the rotating ring 41 to rotate through the support rod 42, the rotating ring 41 drives the spherical rolling bodies 45 to rotate. The spherical rolling bodies 45 reduce the sliding friction between the rotating ring 41 and the lifting cover 4, which facilitates the steering work of the roller 43. The compression spring 46 presses down the lifting cover 4, so that the lifting cover 4 can drive the roller 43 to maintain stable contact with the top of the rectangular docking block 111, thereby improving the monitoring stability.

[0022] The working principle and use process of the utility model are as follows: when the device is used, the docking slot 21 is aligned with the rectangular docking block 111, the rectangular docking block 111 is inserted into the docking slot 21, and the limiting wedge block 3 uses the inclined surface at the bottom to contact the rectangular docking block 111, so that the limiting wedge block 3 can slide away from the rectangular docking block 111, so that the limiting wedge block 3 can retract to facilitate the rectangular docking block 111 to continue to slide upward, and the rectangular docking block 111 passes over the limiting wedge block 3 to reach the position of the pressure sensor 22, the rectangular docking block 111 squeezes the pressure sensor 22, the reset spring 34 squeezes the limiting plate 33, and the limiting plate 33 drives the limiting wedge block 3 to insert into the limiting slot 112, so that a plurality of limiting wedge blocks 3 can limit the rectangular docking block 111, the operation is simple and convenient, no bolt fixing method is required, and the situation that the bolt fixing loosens and affects the processing accuracy is avoided. When the clamping arm 2 and the rectangular docking block 111 are loose, the shaking of the clamping arm 2 causes the distance between the rectangular docking block 111 and the pressure sensor 22 to change, thereby causing the pressure degree of the pressure sensor 22 to change. The pressure sensor 22 can transmit a signal to the staff, so that the staff can check it in time, reduce the need to continue to clamp and fix the subsequent workpiece in the case of looseness, which will affect the quality of the workpiece and reduce losses. After maintenance, the workpiece can be stably positioned to maintain processing accuracy and safety.

Claims

1. A corner positioning clamp, comprising a hydraulic corner cylinder (1), a piston rod (11) and a clamping arm (2), characterized in that: Two corner limit blocks (12) are installed on one side of the hydraulic angle cylinder (1), and a certain angle is formed between the two corner limit blocks (12). A rectangular docking block (111) is fixedly connected to the top end of the piston rod (11), a docking slot (21) is provided at the bottom end of the clamping arm (2), and the rectangular docking block (111) is plugged into the inner wall of the docking slot (21). A pressure sensor (22) is installed in the clamping arm (2), and the output end of the pressure sensor (22) contacts the top end of the rectangular docking block (111). A plurality of limit wedge blocks (3) are slidably connected to the inner wall of the clamping arm (2), and a plurality of limit slots (112) are provided on the side wall of the rectangular docking block (111), and a plurality of limit wedge blocks (3) are plugged into the inner walls of the corresponding limit slots (112).

2. A corner positioning fixture according to claim 1, characterized in that: A traction rope (31) is provided at one end of the plurality of limit wedge blocks (3), a driving ring (32) is provided between the plurality of traction ropes (31), the driving ring (32) is rotatably connected to the top end of the clamping arm (2), and a U-shaped handle (321) is fixedly connected to the top end of the driving ring (32).

3. A corner positioning fixture according to claim 2, characterized in that: A plurality of slide grooves (23) are provided in the clamping arm (2); one end of the limiting wedge block (3) is fixedly connected to a limiting plate (33); the traction rope (31) is fixedly connected to a side corresponding to the limiting plate (33); the limiting plate (33) is slidably connected to an inner wall of the corresponding slide groove (23); and a return spring (34) is fixedly connected to one side of the limiting plate (33).

4. A corner positioning fixture according to claim 3, characterized in that: A plurality of accommodating grooves (24) are provided in the clamping arm (2), the inner wall of the accommodating groove (24) is slidably connected to a lifting cover (4), the inner wall of the lifting cover (4) is rotatably connected to a rotating ring (41), the inner side of the rotating ring (41) is fixedly connected to a support rod (42), the side wall of the support rod (42) is rotatably connected to a roller (43), the roller (43) contacts the top end of the rectangular docking block (111), and a rotation sensor (44) for detecting the roller (43) is installed on the support rod (42).

5. A corner positioning fixture according to claim 4, characterized in that: A plurality of spherical rolling bodies (45) are rotatably connected at both ends of the bottom of the rotating ring (41), and the plurality of spherical rolling bodies (45) are slidably connected to the inner wall of the lifting cover (4). A compression spring (46) is fixedly connected to the top of the lifting cover (4), and one end of the compression spring (46) is fixedly connected to the inner wall of the accommodating groove (24).

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