Pin shaft grabbing tool

Abstract

The utility model relates to a tool device, in order to solve the problem of grabbing and lifting a hinge pin shaft in the assembling process in engineering machinery, the utility model provides a pin shaft grabbing tool which comprises a support, a rotary arm, a lifting arm, two pairs of clamps 6 and the like, and the rotary arm is rotationally connected with the support through a vertical pin shaft; the rotating end of the lifting arm is hinged to the rotating arm through a horizontal pin shaft, and a lifting booster cylinder is arranged between the lifting arm and the rotating arm. The two pairs of clamps are arranged in the length direction of the lifting arm at intervals and located below the lifting arm. The jaw of the clamp is opened and closed downwards; and when the jaws of the clamps are closed, the two clamps have coaxially arranged pin shaft clamping spaces. The hinge pin grabbing tool is of a suspension type, and the hinge pin can be conveniently grabbed and installed.

Description

Technical Field

[0001] The utility model relates to a tooling device, and more specifically, to a pin grasping tooling. Background Art

[0002] During the production process of construction machinery, it is often necessary to grasp the pins to be installed and move the pins to the designated positions so as to use a pin press to press them into the pin holes for assembly.

[0003] Since the pins are large in size and weight, and even lubricating grease is applied during assembly, it is difficult to directly grasp them by hand. Therefore, the existing installation of pins usually uses a pin lifting tooling to lift and move the pins to the installation positions. However, the installation space of some pins is limited. For example, for the pin of the rear support of the boom of an excavator, the pin lifting tooling interferes with the toolbox, resulting in the inability to use the pin press. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is the problem of grasping and lifting the articulated pins during the assembly process in construction machinery, and a pin grasping tooling is provided.

[0005] The technical solution for the utility model to achieve its purpose is: a pin grasping tooling, including a bracket and:

[0006] A slewing arm, rotatably connected to the bracket through a vertical pin;

[0007] A lifting arm, the rotating end of which is hinged to the slewing arm through a horizontal pin, and a lifting assist cylinder is arranged between the lifting arm and the slewing arm;

[0008] Two pairs of clamps, arranged at intervals along the length direction of the lifting arm and located below the lifting arm; the clamp jaws are arranged to open and close downward; when the clamp jaws are closed, the two clamps have a coaxially arranged pin clamping space.

[0009] In the pin grasping tooling of the utility model, the clamp includes a fixed clamp arm fixed on the lifting arm, a movable clamp arm rotatably connected to the fixed clamp arm through a horizontal pin, and an opening and closing mechanism arranged between the lifting arm and the movable clamp arm for pulling the movable clamp arm to swing up and down.

[0010] In the pin grasping tooling of the utility model, the lower section of the fixed clamp arm is vertical; the movable clamp arm is arc-shaped, its upper end is rotatably connected to the fixed clamp arm, and its lower end is opposite to the lower end of the fixed clamp arm when the clamp jaws are closed.

[0011] In the pin grasping tooling of the utility model, the opening and closing mechanism includes a first connecting rod and a second connecting rod. The upper end of the first connecting rod is rotatably connected to the lifting arm through a horizontal pin, the lower end of the first connecting rod is rotatably connected to the upper end of the second connecting rod through a horizontal pin, and the lower end of the second connecting rod is rotatably connected to the movable clamp arm through a horizontal pin.

[0012] In the pin-grabbing tooling of the present utility model, a jaw-closure holding device is provided between the opening and closing mechanism and the lifting arm.

[0013] In the pin-grabbing tooling of the present utility model, a rigid connecting member with rigid connection is provided between the first link rods of the two pairs of clamping jaws, and a handle is provided on the rigid connecting member.

[0014] In the pin-grabbing tooling of the present utility model, a tension spring is arranged in at least one of the clamping jaws. Two ends of the tension spring are respectively connected with the lifting arm and the second link rod, and the torque direction generated by the elastic force of the tension spring on the movable jaw arm is consistent with the direction of the movable jaw arm opening the jaws.

[0015] In the pin-grabbing tooling of the present utility model, the rigid connecting member includes two rigid connecting rods arranged in parallel, and the two ends of each of them are fixedly connected with the first link rods in the two opening and closing mechanisms correspondingly.

[0016] In the pin-grabbing tooling of the present utility model, the jaw-closure holding device includes two sliding sleeves correspondingly sleeved on the two rigid connecting rods, and a connecting plate fixedly connecting the two sliding sleeves. The handle is fixed on the sliding sleeve or the connecting plate; a first limiting member is arranged on the sliding sleeve, and a second limiting member is arranged on the lifting arm. When the jaws of the clamping jaw are in a closed state, the first limiting member can move relative to the second limiting member and be plugged and connected or disengaged.

[0017] In the pin-grabbing tooling of the present utility model, a spiral spring is sleeved on at least one rigid connecting rod. One end of the spiral spring abuts against the first link rod, and the other end abuts against the sliding sleeve. The elastic force direction of the spiral spring is consistent with the direction of the first limiting member and the second limiting member being plugged together.

[0018] Compared with the prior art, the pin-grabbing tooling of the present utility model is of a hanging type, which is convenient for grabbing pins and installing pins. Brief Description of the Drawings

[0019] Figure 1 is a schematic diagram of the pin-grabbing tooling of the present utility model grabbing a pin.

[0020] Figure 2 is a schematic structural diagram of the pin-grabbing tooling of the present utility model.

[0021] Figure 3 is a schematic structural diagram of the lifting arm in the pin-grabbing tooling of the present utility model.

[0022] Figure 4 is a schematic structural diagram of the sliding sleeve in the pin-grabbing tooling of the present utility model.

[0023] Names and serial numbers of components in the figure:

[0024] Bracket 1.

[0025] Rotating arm 2.

[0026] Lifting assist cylinder 3.

[0027] Lifting arm 4, first horizontal pin shaft 41, support 42.

[0028] Pin shaft to be clamped 5.

[0029] Clamp 6, fixed clamp arm 61, movable clamp arm 62, second horizontal pin shaft 63, pin shaft clamping space 64.

[0030] Opening and closing mechanism 7, first connecting rod 71, second connecting rod 72, third horizontal pin shaft 73, fourth horizontal pin shaft 74, fifth horizontal pin shaft 75, rigid connecting rod 76, handle 77, tension spring 78.

[0031] Jaw closing and holding device 8, sliding sleeve 81, connecting plate 82, helical spring 83, second limiting member 84, first limiting member 85. Detailed implementation manners

[0032] The following describes the specific implementation manners with reference to the accompanying drawings.

[0033] As Figure 1 Figure 2 shown, the pin shaft grasping tooling includes bracket 1, rotating arm 2, lifting arm 4, two pairs of clamps 6, etc.

[0034] The rotating arm 2 is rotatably connected to the bracket 1 through a vertical pin shaft. The lifting arm 4 is installed on the rotating arm 2. The rotating arm 2 rotates around the vertical pin shaft, driving the lifting arm 4 to rotate and move within the horizontal plane.

[0035] The rotating end of the lifting arm 4 is hinged to the rotating arm 2 through the first horizontal pin shaft 41. A lifting assist cylinder 3 is provided between the lifting arm 4 and the rotating arm 2. The lifting assist cylinder 3 can be a pneumatic cylinder or a gas spring, which assists in the lifting of the lifting arm.

[0036] Two pairs of clamps 6 are arranged at intervals along the length direction of the lifting arm 4 and are arranged below the lifting arm 4; the jaws of the clamp 6 are arranged to open and close downward; when the jaws of the clamp 6 are closed, the two clamps 6 have a coaxially arranged pin shaft clamping space 64.

[0037] As Figure 2 Figure 3As shown in the figure, the clamp 6 includes a fixed clamp arm 61 fixed to the lifting arm 4, a movable clamp arm 62 rotatably connected to the fixed clamp arm 61 through a second horizontal pin shaft 63, and an opening and closing mechanism 7 provided between the lifting arm 4 and the movable clamp arm 62. The opening and closing mechanism 7 is used to pull the movable clamp arm to swing up and down. The lower section of the fixed clamp arm 61 is vertical; the movable clamp arm 62 is arc-shaped, its upper end is rotatably connected to the fixed clamp arm 61, and its lower end is opposite to the lower end of the fixed clamp arm 61 when the jaws are closed. The opening and closing mechanism 7 pushes the movable clamp arm 62 to turn up and down around the second horizontal pin shaft 63. When the movable clamp arm 62 turns down, the lower end of the movable clamp arm 62 is opposite to the lower end of the fixed clamp arm 61, so as to form a pin clamping space 64 for accommodating the clamped pin 5 between the movable clamp arm 62 and the fixed clamp arm 61, and clamp and fix the clamped pin 5 therein.

[0038] As Figure 2 shown in the figure, the opening and closing mechanism 7 includes a first connecting rod 71 and a second connecting rod 72. The upper end of the first connecting rod 71 is rotatably connected to the lifting arm 4 through a third horizontal pin shaft 73, the lower end of the first connecting rod 71 is rotatably connected to the upper end of the second connecting rod 72 through a fourth horizontal pin shaft 74, and the lower end of the second connecting rod 72 is rotatably connected to the movable clamp arm 62 through a fifth horizontal pin shaft 75. Further, in order to facilitate the connection between the lifting arm 4 and the first connecting rod 71, a support 42 is provided on the lifting arm 4, and the upper end of the first connecting rod 71 is connected to the support 42.

[0039] A rigid connecting member with rigid connection is provided between the first connecting rods 71 of the two pairs of clamps 6. The rigid connecting member connects the first connecting rods 71 in the opening and closing mechanisms of the two pairs of clamps into an integral structure, realizes the synchronous movement of the two first connecting rods 71, and realizes the simultaneous opening or closing of the two pairs of clamps 6.

[0040] The rigid connecting member includes two rigid connecting rods 76 arranged in parallel. The two ends of the rigid connecting rods 76 are fixedly connected to the first connecting rods 71 in the two opening and closing mechanisms 7 respectively.

[0041] Further, a jaw closing holding device 8 is provided between the opening and closing mechanism 7 and the lifting arm 4, which is used to keep the jaws of the clamp 6 in a closed state after closing. As Figure 2 shown in the figure, the jaw closing holding device 8 includes two sliding sleeves 81 sleeved on the two rigid connecting rods 76 correspondingly, a connecting plate 82 fixedly connecting the two sliding sleeves 81, and a handle 77 is fixed on the sliding sleeve 81 or the connecting plate 82; a first limiting member 85 is provided on the sliding sleeve 81, and a second limiting member 84 is provided on the lifting arm 4. When the jaws of the clamp 6 are in a closed state, the first limiting member 85 can move relative to the second limiting member 84 and be inserted and connected or disengaged. As Figure 3 shown in the figure, in this embodiment, the second limiting member 84 is a plug board fixed on the lifting arm 4. As Figure 4As shown, the first limiting member 85 is a snap ring fixed on the sliding sleeve 81. When the clamp 6 is in the closed state, the sliding sleeve 81 is moved towards the second limiting member 84, so that the second limiting member 84 is inserted into the first limiting member 85, thereby fixing the first connecting rod 71 and preventing the clamp 6 from opening. Correspondingly, when the sliding sleeve 81 moves away from the second limiting member 84, the second limiting member 84 disengages from the first limiting member 85, releasing the restriction on the first connecting rod 71, and the first connecting rod 71 can be turned upwards to open the clamp 6.

[0042] A spiral spring 83 is sleeved on two rigid connecting rods 76. One end of the spiral spring 83 abuts against the first connecting rod 71, and the other end abuts against the sliding sleeve 81. The elastic force direction of the spiral spring 83 is the same as the direction in which the first limiting member 85 and the second limiting member 84 are inserted. Without the action of external force, the spiral spring 83 applies a force to the sliding sleeve 81 to keep the first limiting member 85 and the second limiting member 84 in the inserted state, preventing the clamp 6 from accidentally opening. When it is necessary to open the clamp 6, the sliding sleeve 81 is moved by the handle 77 to compress the spiral spring 83, so that the first limiting member 85 and the second limiting member 84 are disengaged.

[0043] As Figure 2 shown, a tension spring 78 is arranged in one of the clamps. The torque direction generated by the elastic force of the tension spring 78 on the movable jaw 62 is the same as the direction in which the movable jaw 62 opens the jaws. After the clamp 6 is opened, the tension of the tension spring 78 causes the movable jaw 62 to remain in the upwardly turned posture, so that the clamp 6 remains in the open state.

[0044] In the pin grasping tooling of the present utility model, the pin grasping tooling of the present utility model is of a hanging type, which is convenient for grasping the pinned pin and the installation of the pinned pin.

Claims

1. A pin grasping tooling, characterized in that, including a bracket and: a slewing arm rotatably connected to the bracket through a vertical pin shaft; a lifting arm, the rotating end of which is hinged to the slewing arm through a horizontal pin shaft, and a lifting assist cylinder is arranged between the lifting arm and the slewing arm; two pairs of clamps, arranged at intervals along the length direction of the lifting arm and located below the lifting arm; the clamp jaws are arranged to open and close downward; when the clamp jaws are closed, the two clamps have a coaxial pin shaft clamping space.

2. The pin gripper tooling according to claim 1, wherein The clamp includes a fixed clamp arm fixed on the lifting arm, a movable clamp arm rotatably connected to the fixed clamp arm through a horizontal pin shaft, and an opening and closing mechanism arranged between the lifting arm and the movable clamp arm for pulling the movable clamp arm to swing up and down.

3. The pin gripper tooling according to claim 2, wherein The lower section of the fixed clamp arm is vertical; the movable clamp arm is arc-shaped, its upper end is rotatably connected to the fixed clamp arm, and its lower end is opposite to the lower end of the fixed clamp arm when the jaws are closed.

4. The pin grasping tooling according to claim 2 or 3, characterized in that The opening and closing mechanism includes a first connecting rod and a second connecting rod. The upper end of the first connecting rod is rotatably connected to the lifting arm through a horizontal pin shaft, the lower end of the first connecting rod is rotatably connected to the upper end of the second connecting rod through a horizontal pin shaft, and the lower end of the second connecting rod is rotatably connected to the movable clamp arm through a horizontal pin shaft.

5. The pin gripper tooling according to claim 4, wherein A jaw closing holding device is arranged between the opening and closing mechanism and the lifting arm.

6. The pin grasping tooling according to claim 5, wherein A rigid connecting member with rigid connection is arranged between the first connecting rods of the two pairs of clamps, and a handle is arranged on the rigid connecting member.

7. The pin gripper tooling according to claim 6, characterized in that, At least one pair of clamps is provided with a tension spring, and the two ends of the tension spring are respectively connected to the lifting arm and the second connecting rod. The moment direction generated by the elastic force of the tension spring on the movable clamp arm is the same as the direction of the movable clamp arm opening the jaws.

8. The pin gripper tooling according to claim 6 or 7, characterized in that, The rigid connecting member includes two rigid connecting rods arranged in parallel and the two ends of each are fixedly connected to the first connecting rods in the two opening and closing mechanisms correspondingly.

9. The pin grasping tooling according to claim 8, wherein, The jaw closing holding device includes two sliding sleeves correspondingly sleeved on the two rigid connecting rods, a connecting plate fixedly connecting the two sliding sleeves, and the handle is fixed on the sliding sleeve or the connecting plate; a first limiting member is arranged on the sliding sleeve, and a second limiting member is arranged on the lifting arm. When the clamp jaws are in the closed state, the first limiting member can move relative to the second limiting member and be inserted and connected or disengaged.

10. The pin grasping tooling according to claim 9, characterized in that, At least one spiral spring is sleeved on one rigid connecting rod, one end of the spiral spring abuts against the first connecting rod, and the other end abuts against the sliding sleeve. The elastic force direction of the spiral spring is the same as the direction of the first limiting member and the second limiting member being inserted.

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