A stretch head locking device

Abstract

The utility model discloses a kind of stretching head locking devices, including fixed head frame, the fixed head frame one end is provided with jaw, the fixed head frame is fixedly arranged with hook connecting frame away from jaw end, hook device and hook drive oil cylinder are provided on the hook connecting frame, the hook device is close to the end of hook connecting frame and is provided with stainless steel pin shaft, hook device is formed articulated between stainless steel pin shaft and hook connecting frame;The rear end of the hook drive oil cylinder is provided with oil cylinder seat, and the side surface upper end of the oil cylinder seat and fixed head frame are fixed by bolt connection;The front end of the hook drive oil cylinder is provided with piston rod, and the front end of the piston rod is connected with hook device;The front end of the hook drive oil cylinder is obliquely arranged downwards, and hook device is rotated by the piston rod telescopic drive of hook drive oil cylinder.The above technical solution, structure design is reasonable, stretch head is convenient to assemble and disassemble, and practicality is good with high disassembly work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of stretching machine technology, specifically to a stretching head locking device. Background Technology

[0002] The stretching head is the actuator of the stretching machine. Existing stretching machines generally have a jaw (clamp) at one end of the stretching head for clamping the workpiece; the other end of the stretching head has a locking device for connecting to the drive unit. The connection part of the existing drive unit is made of iron. However, the existing stretching head locking device has an unreasonable structural design. The locking device generally has a flange and multiple bolts, which means that when installing and disassembling the stretching head, each bolt must be reinstalled. The process of installing and disassembling the stretching head is cumbersome, takes a long time, has low work efficiency, and has poor practicality. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a tension head locking device with reasonable structural design, convenient assembly and disassembly of the tension head, high assembly and disassembly efficiency and good practicality.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tension head locking device, comprising a fixed head frame, one end of which is provided with jaws, and a hook connecting frame fixedly provided on the fixed head frame away from the jaws end. A hook device and a hook driving cylinder are provided on the hook connecting frame. A stainless steel pin is provided near the end of the hook device, and the hook device is hinged to the hook connecting frame via the stainless steel pin. A cylinder seat is provided at the rear end of the hook driving cylinder, and the cylinder seat is bolted to the upper side of the fixed head frame. A piston rod is provided at the front end of the hook driving cylinder, and the front end of the piston rod is connected to the hook device. The front end of the hook driving cylinder is inclined downwards, and the extension and retraction of the piston rod of the hook driving cylinder drives the hook device to rotate.

[0005] The hook device includes a first hook and a second hook, and a hook connecting shaft is fixedly provided between the first hook and the second hook; a magnet mounting groove is provided on the inner wall surface of the first hook and the second hook, and a positioning magnet is fixedly provided in each magnet mounting groove.

[0006] A first limiting rod is provided at the opening of the first hook. One end of the first limiting rod is hinged to a partial position of the first hook. A first torsion spring is provided at the hinge of the first limiting rod, or a first positioning spring is provided near the hinge position of the first limiting rod. The other end of the first limiting rod is engaged and fixed to a partial position of the inner wall surface of the first hook under the action of the first torsion spring or the first positioning spring.

[0007] The present invention is further configured such that: both the first hook and the second hook are made of stainless steel, and one end of both the first hook and the second hook are hinged to the hook connection structure via a pin.

[0008] The present invention is further configured such that: a connecting plate is provided at the upper end of the first hook, the connecting plate is fixedly connected to the upper end face of the first hook by bolts, a first connecting protrusion and a second connecting protrusion are integrally provided on the upper end face of the connecting plate, a first shaft hole is provided on the front end face of the first connecting protrusion, a second shaft hole is provided on the front end face of the second connecting protrusion aligned with the first shaft hole, a piston rod connecting shaft is provided between the first shaft hole and the second shaft hole, a connecting lug is fixedly provided at the front end of the piston rod, a third shaft hole is provided at the front end of the connecting lug, and the piston rod connecting shaft passes through the third shaft hole.

[0009] The present invention is further configured such that: one end of the hook connecting frame is fixed to the fixed head frame by welding or by bolt connection; the hook connecting frame includes a first connecting frame and a second connecting frame; a fourth shaft hole is provided on the front end face of the first connecting frame; a fifth shaft hole is provided on the front end face of the second connecting frame aligned with the fourth shaft hole; the front end of the stainless steel pin is inserted into the fourth shaft hole; and the rear end of the stainless steel pin is inserted into the fifth shaft hole.

[0010] The present invention is further configured such that: one end of the first limiting rod is hinged to a portion of the first hook via a pin; a second limiting rod is provided at the opening of the second hook, one end of the second limiting rod is hinged to a portion of the second hook via a pin, a second torsion spring is provided at the hinge of the second limiting rod or a second positioning spring is provided near the hinge of the second limiting rod, and the other end of the second limiting rod is engaged and fixed to a portion of the inner wall surface of the second hook under the action of the second torsion spring or the second positioning spring.

[0011] The present invention is further configured such that both the first limiting rod and the second limiting rod are made of stainless steel.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model has a reasonable structural design. When installing and disassembling the stretching head, the front end of the hook drive cylinder is tilted downwards. The piston rod of the hook drive cylinder extends and retracts to drive the hook device to rotate. Since the first hook and the second hook of the hook device are fixedly connected by the hook connecting shaft, the first hook and the second hook are linked when the hook device rotates. After the hook device rotates to a certain angle, it is connected to the iron connecting part of the existing drive device. The iron connecting part of the existing drive device is attracted by the positioning magnet. The first limit rod and the second limit rod can play a limiting role, making the hook device connection reliable and not easy to fall off. The entire installation and disassembly process does not require the use of multiple cumbersome bolts for fastening. The installation and disassembly of the stretching head is convenient, the installation and disassembly work efficiency is high, and the practicality is good.

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Figure 2 This is a top view schematic diagram of an embodiment of the present utility model;

[0016] Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0017] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] See Figures 1 to 3 This utility model discloses a tension head locking device, including a fixed head frame 1. One end of the fixed head frame 1 is provided with jaws 2. A hook connecting frame 3 is fixedly provided on the fixed head frame 1 away from the jaws end. A hook device 4 and a hook driving cylinder 5 are provided on the hook connecting frame 3. A stainless steel pin 6 is provided near the end of the hook device 4, and the hook device 4 is hinged to the hook connecting frame 3 via the stainless steel pin 6. A cylinder seat 51 is provided at the rear end of the hook driving cylinder 5, and the cylinder seat 51 is fixed to the upper side of the fixed head frame 1 by bolts. A piston rod 52 is provided at the front end of the hook driving cylinder 5, and the front end of the piston rod 52 is connected to the hook device 4. The front end of the hook driving cylinder 5 is inclined downwards, and the extension and retraction of the piston rod 52 of the hook driving cylinder 5 drives the hook device 4 to rotate.

[0019] The hook device 4 includes a first hook 41 and a second hook 42, and a hook connecting shaft 43 is fixedly provided between the first hook 41 and the second hook 42; a magnet mounting groove is provided on the inner wall surface of the first hook 41 and the second hook 42, and a positioning magnet 44 is fixedly provided in each magnet mounting groove.

[0020] A first limiting rod 45 is provided at the opening of the first hook 41. One end of the first limiting rod 45 is hinged to a partial position of the first hook 41. A first torsion spring is provided at the hinge of the first limiting rod 45 or a first positioning spring is provided near the hinge position of the first limiting rod 45. The other end of the first limiting rod 45 is engaged and fixed to a partial position of the inner wall surface of the first hook 41 under the action of the first torsion spring or the first positioning spring.

[0021] Preferably, both the first hook 41 and the second hook 42 are made of stainless steel, and one end of each hook 41 and the second hook 42 is hinged to the hook connecting frame 3 via a pin. Each positioning magnet 44 is fixed to the inner wall of the aligned magnet mounting slot by adhesive or screws. A connecting shaft is provided on the cylinder seat 51, and the cylinder seat 51 is connected to the rear end of the drive cylinder 5 via the connecting shaft. The front end of the hook drive cylinder 5 is tilted downwards at 30-60°. The extension and retraction of the piston rod 52 of the hook drive cylinder 5 drives the hook device 4 to rotate 0-90°.

[0022] To make the structural design of this utility model more reasonable, as a preferred embodiment, the upper end of the first hook 41 is provided with a connecting plate 46. The connecting plate 46 is fixed to the upper end face of the first hook 41 by bolts. The upper end face of the connecting plate 46 is integrally provided with a first connecting protrusion 461 and a second connecting protrusion 462. The front end face of the first connecting protrusion 461 is provided with a first shaft hole. The front end face of the second connecting protrusion 462 is provided with a second shaft hole aligned with the first shaft hole. A piston rod connecting shaft 47 is provided between the first shaft hole and the second shaft hole. A connecting ear 7 is fixedly provided at the front end of the piston rod 52. The front end of the connecting ear 7 is provided with a third shaft hole. The piston rod connecting shaft 47 passes through the third shaft hole.

[0023] Preferably, the rear end of the connecting earring 7 is fixed to the front end of the piston rod 52 by a threaded connection or by welding.

[0024] One end of the hook connecting frame 3 is fixed to the fixed head frame 1 by welding or by bolts. The hook connecting frame 3 includes a first connecting frame 31 and a second connecting frame 32. A fourth shaft hole is provided on the front end face of the first connecting frame 31, and a fifth shaft hole is provided on the front end face of the second connecting frame 32 aligned with the fourth shaft hole. The front end of the stainless steel pin 6 is inserted into the fourth shaft hole, and the rear end of the stainless steel pin 6 is inserted into the fifth shaft hole.

[0025] Preferably, one end of the first limiting rod 45 is hinged to a portion of the first hook 41 via a pin; a second limiting rod is provided at the opening of the second hook 42, one end of the second limiting rod is hinged to a portion of the second hook 42 via a pin, a second torsion spring is provided at the hinge point of the second limiting rod or a second positioning spring is provided near the hinge point of the second limiting rod, and the other end of the second limiting rod is engaged and fixed to a portion of the inner wall surface of the second hook 42 under the action of the second torsion spring or the second positioning spring.

[0026] Both the first and second limit rods are made of stainless steel.

[0027] Preferably, this embodiment provides at least one first limiting rod 45. When one end of the first limiting rod 45 is hinged to a part of the first hook 41 via a pin, a first torsion spring is sleeved on the pin at the hinge (or a first positioning spring is provided near the hinge position of the first limiting rod 45, one end of the first positioning spring is welded to the first limiting rod, and the other end of the first positioning spring is welded to the inner wall of the groove of the first hook 41). The first limiting rod 45 can automatically reset under the elastic force of the first torsion spring or the first positioning spring, and the first limiting rod 45 is locked and fixed to a part of the inner wall of the first hook 41 away from the hinge end.

[0028] In practical applications, when installing or removing the stretching head, the front end of the hook drive cylinder 5 is tilted downwards. The piston rod 52 of the hook drive cylinder 5 extends and retracts to drive the hook device 4 to rotate. Since the first hook 41 and the second hook 42 of the hook device 4 are fixedly connected by the hook connecting shaft 43, the first hook 41 and the second hook 42 are linked when the hook device 4 rotates. After the hook device 4 rotates at a certain angle, it connects with the iron connecting part of the existing drive device and is attracted to the iron connecting part of the existing drive device by the positioning magnet 44. The first limit rod 45 and the second limit rod can play a limiting role, making the hook device 4 reliably connected and not easy to fall off. The entire installation and removal process does not require the use of multiple cumbersome bolts for fastening. The structure is reasonably designed, the installation and removal of the stretching head is convenient, the installation and removal work efficiency is high, and the practicality is good.

[0029] The above description of the specific embodiments of this utility model is only used to further illustrate this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made to this utility model by technical engineers based on the above description of the utility model shall fall within the scope of protection of this utility model.

Claims

1. A tension head locking device, comprising a fixed head frame (1), wherein one end of the fixed head frame (1) is provided with a jaw (2), characterized in that: The fixed head frame (1) is fixedly provided with a hook connecting frame (3) away from the jaw end. The hook connecting frame (3) is provided with a hook device (4) and a hook driving cylinder (5). The hook device (4) is provided with a stainless steel pin (6) near the end of the hook connecting frame. The hook device (4) is hinged to the hook connecting frame (3) through the stainless steel pin (6). The rear end of the hook driving cylinder (5) is provided with a cylinder seat (51). The cylinder seat (51) is fixed to the upper side of the fixed head frame (1) by bolts. The front end of the hook driving cylinder (5) is provided with a piston rod (52). The front end of the piston rod (52) is connected to the hook device (4). The front end of the hook driving cylinder (5) is inclined downward. The extension and retraction of the piston rod (52) of the hook driving cylinder (5) drives the hook device (4) to rotate. The hook device (4) includes a first hook (41) and a second hook (42), and a hook connecting shaft (43) is fixedly provided between the first hook (41) and the second hook (42); a magnet mounting groove is provided on the inner wall surface of the first hook (41) and the second hook (42), and a positioning magnet (44) is fixedly provided in each magnet mounting groove. A first limiting rod (45) is provided at the opening of the first hook (41). One end of the first limiting rod (45) is hinged to a partial position of the first hook (41). A first torsion spring is provided at the hinge of the first limiting rod (45) or a first positioning spring is provided near the hinge position of the first limiting rod (45). The other end of the first limiting rod (45) is engaged and fixed to a partial position of the inner wall surface of the first hook (41) under the action of the first torsion spring or the first positioning spring.

2. The tension head locking device according to claim 1, characterized in that: The first hook (41) and the second hook (42) are both made of stainless steel, and one end of the first hook (41) and the second hook (42) are hinged to the hook connecting frame (3) by a pin.

3. The tension head locking device according to claim 2, characterized in that: A connecting plate (46) is provided at the upper end of the first hook (41). The connecting plate (46) is fixed to the upper end face of the first hook (41) by bolts. A first connecting protrusion (461) and a second connecting protrusion (462) are integrally provided on the upper end face of the connecting plate (46). A first shaft hole is provided on the front end face of the first connecting protrusion (461). A second shaft hole is provided on the front end face of the second connecting protrusion (462) aligned with the first shaft hole. A piston rod connecting shaft (47) is provided between the first shaft hole and the second shaft hole. A connecting ear (7) is fixedly provided at the front end of the piston rod (52). A third shaft hole is provided at the front end of the connecting ear (7). The piston rod connecting shaft (47) passes through the third shaft hole.

4. The tension head locking device according to claim 3, characterized in that: One end of the hook connecting frame (3) is fixed to the fixed head frame (1) by welding or by bolts. The hook connecting frame (3) includes a first connecting frame (31) and a second connecting frame (32). A fourth shaft hole is provided on the front end face of the first connecting frame (31), and a fifth shaft hole is provided on the front end face of the second connecting frame (32) aligned with the fourth shaft hole. The front end of the stainless steel pin (6) is inserted into the fourth shaft hole, and the rear end of the stainless steel pin (6) is inserted into the fifth shaft hole.

5. A tension head locking device according to claim 2 or 4, characterized in that: One end of the first limiting rod (45) is hinged to a part of the first hook (41) by a pin; a second limiting rod is provided at the opening of the second hook (42), one end of the second limiting rod is hinged to a part of the second hook by a pin, a second torsion spring is provided at the hinge of the second limiting rod or a second positioning spring is provided near the hinge of the second limiting rod, and the other end of the second limiting rod is engaged and fixed to a part of the inner wall surface of the second hook (42) under the action of the second torsion spring or the second positioning spring.

6. A tension head locking device according to claim 5, characterized in that: Both the first and second limit rods are made of stainless steel.

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