CN202591926U - Device for disassembling spring pin of blind hole - Google Patents

Abstract

The utility model discloses a blind hole spring pin removal device, which comprises: a cylindrical pin puller body, the pin puller has a threaded section and a gripper section along the axial direction, and the threaded section is provided with an outer Thread, the claw section has several claws evenly arranged along the circumferential direction of the pin puller body, and the end of each claw has a protrusion protruding outward; a mandrel is arranged in the pin puller body ; a nut, one end of which is threaded with the threaded section of the pin puller body; a bolt, whose one end is threaded with the other end of the nut; a hammer, which is worn on the bolt and can slide along the axial direction of the bolt . The blind hole spring pin removal device described in the utility model can easily remove the spring pin on the coupling, and greatly reduces the time consumption of dismounting the spring pin, and reduces the average time consumption of disassembling a spring pin from the original 30 minutes to 5 minutes, thereby greatly reducing the downtime of unit failure and reducing the labor intensity of maintenance personnel.

Description

A blind hole spring pin removal device

technical field

The utility model relates to a mechanical tool, in particular to a dismounting device.

Background technique

The 2030 rolling mill is a rolling mill with a safety pin coupling. The function of the safety pin coupling is to transmit the rotational torque of the main drive motor to the gearbox, thereby driving the transmission shaft to rotate. It has the characteristics of self-centering, and can automatically cut off the safety pin to protect the rolling mill equipment and the large motor when it is overloaded. Its handle is lubricated with dry oil. The two connection points on both sides of the gearbox adopt circular arc teeth, which can transmit torque on the one hand and eliminate the influence of deflection angle caused by the non-concentricity of the large motor and the gearbox on the other hand.

During the use of the above-mentioned rolling mill, when the safety pin coupling needs to be inspected or replaced, 36 spring pins on both sides of the coupling must be removed to disassemble the coupling. Wherein the spring pin on the reduction box side is arranged in the blind hole. Figure 1 shows the setting structure of the spring pin on the gearbox side of the coupling. As shown in FIG. 1 , a blind hole is provided on the coupling body 3 , and a spring pin 1 is set in the blind hole and fixed by a bolt 2 . The current method for removing the spring pin is to weld the bolt 2 to the spring pin 1, and then pull it out through the core pulling cylinder. It takes a long time to disassemble the spring pin by this method, and it takes an average of 30 minutes to disassemble one spring pin; in addition, the spring pin 1 and bolt 2 removed in this way cannot be used anymore, and new spring pins and bolts need to be replaced, resulting in Wasted.

Contents of the invention

The purpose of the invention of the utility model is to provide a blind hole spring pin removal device, which can easily remove the spring pin and greatly reduce the time required for removing the spring pin.

According to the purpose of the above invention, the utility model proposes a blind hole spring pin removal device, which includes:

A cylindrical pin puller body, the pin puller has a threaded segment and a gripper segment along its axial direction, the threaded segment is provided with external threads, and the gripper segment has uniformly arranged along the circumferential direction of the pin puller body a plurality of grippers, the end of each gripper has an outwardly protruding protrusion;

a mandrel, which is arranged in the pin puller body;

A nut, one end of which is threadedly connected to the threaded section of the pin puller body;

a bolt, one end of which is threadedly connected to the other end of the nut;

A hammer body is installed on the bolt and can slide along the axial direction of the bolt.

When using the removal device described in this technical solution to disassemble the spring pin, it is necessary to knock the claw section of the pin puller body into the center hole of the spring pin until the claw catches the end surface of the spring pin near the bottom of the blind hole, and then Put the mandrel into the body of the pin puller, and tighten the nut on the threaded section of the body of the pin puller, then install the bolt on the other end of the nut, and then put the hammer body on the bolt, and then make the hammer body along the The axial direction of the bolt hammers the end face of the nut so that the end of the gripper exerts a force on the bottom surface of the blind hole, and at the same time the bottom surface of the blind hole gives a reaction force to the end of the gripper, which in turn makes the end of the gripper a force. The protrusion pushes the spring pin out of the blind hole.

Preferably, in the above blind hole spring pin removal device, the other end of the bolt is threadedly connected with a stop nut.

Preferably, in the above blind hole spring pin removal device, the pin puller body has a pin hole opened along its radial direction, and the pin hole is arranged in front of one end surface of the nut. The pin hole is provided for tightening the nut on the pin puller body.

The blind hole spring pin removal device described in the utility model can easily remove the spring pin on the coupling, and greatly reduces the time consumption of dismounting the spring pin, and reduces the average time consumption of disassembling a spring pin from the original 30 minutes to 5 minutes, thereby greatly reducing the downtime of unit failure and reducing the labor intensity of maintenance personnel.

Description of drawings

Fig. 1 is a schematic diagram of the setting structure of the spring pin on the reduction box side of the existing coupling.

Fig. 2 is a structural schematic diagram of a blind hole spring pin removal device according to an embodiment of the present invention.

Fig. 3 is a structural schematic diagram of a pin puller body in an embodiment of the blind hole spring pin removal device according to the present invention.

FIG. 4 is a side view of FIG. 3 .

Fig. 5 is a sectional view of plane A-A in Fig. 4 .

Fig. 6 is a schematic structural view of the mandrel in an embodiment of the device for removing blind hole spring pins according to the present invention.

Fig. 7 is a cross-sectional view of a nut in an embodiment of the blind hole spring pin removal device according to the present invention.

Fig. 8 is a structural schematic diagram of a bolt in an embodiment of the blind hole spring pin removal device according to the present invention.

Detailed ways

The blind hole spring pin removal device described in the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 2 shows the structure of the blind hole spring pin removal device in this embodiment according to the utility model. As shown in Figure 2, a mandrel 5 is provided in the cylindrical hollow pin puller body 4, and its threaded section is threadedly connected with one end of the nut 6. A pin shaft is provided to tighten the nut 6 and the pin puller body 4 , and the nut 6 is also threadedly connected to one end of the bolt 7 . The hammer body 8 is mounted on the bolt 7 and can slide along the axial direction of the bolt 7 . The other end of the bolt 7 is threadedly connected with the stop nut 9 .

Please continue to refer to Figure 2. To disassemble the spring pin using the dismounting device described in this embodiment, it is necessary to place the gripper segment of the pin puller body 4 into the center hole of the spring pin 1 until the protrusion at the end of the gripper catches Close to the end face of the spring pin 1 at the bottom end of the blind hole on the coupling body 3; then put the mandrel 5 into the pin puller body 4, and tighten the nut 6 on the threaded section of the pin puller body 4; then put the bolt 7 is installed on the other end of the nut 6; then the hammer body 8 is pierced on the bolt, and the spring pin 1 is pulled out by the force of the hammer body 8.

Fig. 3 shows the structure of the pin puller body in the blind hole spring pin removal device of this embodiment. FIG. 4 is a side view of FIG. 3 . Fig. 5 is a sectional view of plane A-A in Fig. 4 . As shown in Fig. 3, Fig. 4 and Fig. 5, the body of the pin puller is hollow cylindrical, and has a threaded section C and a gripper section D along its axial direction. The threaded section C is provided with external threads, and the gripper section D There are four grasping claws 41 uniformly arranged along the circumferential direction of the pin puller body, and the end of each grasping claw 41 has an outwardly protruding protrusion. The pin puller body also has a pin hole 42 opened along its radial direction.

Fig. 6 shows the structure of the mandrel in the blind hole spring pin removal device of this embodiment. As shown in Figure 6, the mandrel is a cylinder, which is arranged in the pin puller body.

Fig. 7 shows the structure of the nut in the blind hole spring pin removal device of this embodiment. As shown in FIG. 7 , the end E of the nut is threadedly connected with the bolt; the end F of the nut is threadedly connected with the threaded section of the pin puller body.

Fig. 8 shows the structure of the bolt in the blind hole spring pin removal device of this embodiment. As shown in FIG. 8 , the bolt is a stud bolt, one end of which is threaded with the E end of the nut (as shown in FIG. 7 ); the other end is threaded with the stop nut.

It should be noted that the above examples are only specific embodiments of the present utility model, and obviously the present utility model is not limited to the above embodiments, and there are many similar changes thereupon. If those skilled in the art directly derive or associate all deformations from the content disclosed in the utility model, they shall all belong to the protection scope of the utility model.

Claims (3)

1. blind hole spring catch provision for disengagement is characterized in that, comprising:

One columniform pin removal body; Said pin removal has a thread segment and a gripper section along its axial direction; Said thread segment is provided with external screw thread; Said gripper section has several grippers that evenly are provided with along the circumferential direction of pin removal body, and the end of said each gripper all has an outwardly directed convexity;

One plug, it is located in the said pin removal body;

One nut, the one of which end is threaded with the thread segment of said pin removal body;

One bolt, the one of which end is threaded with the other end of said nut;

One hammer body, it is arranged on the said bolt, and can slide along the axial direction of bolt.

2. blind hole spring catch as claimed in claim 1 provision for disengagement is characterized in that, the other end of the said bolt backstop nut that also has been threaded.

3. according to claim 1 or claim 2 blind hole spring catch provision for disengagement is characterized in that, has the pin-and-hole offered along its radial direction on the said pin removal body, and said pin-and-hole is located at the place ahead of nut one end end face.

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