A disassembling internal thread cylindrical pin device

Abstract

The utility model discloses a kind of disassembling internal thread cylindrical pin devices, it is related to mechanical dismounting tool technical field, including pulling pin box, gear shaft two, output, gear shaft one, threaded shaft, screw, aligning bearing one, one-way thrust ball bearing one and one-way thrust ball bearing two, power is input by output end and drives gear shaft two, gear shaft one rotates by driving one-way thrust ball bearing to drive threaded shaft rotation, screw passes through threaded shaft and is matched with its thread, and limit pulling pin box and rotate, one-way thrust ball bearing is used to bear axial pulling force. The utility model provides strong pulling force by gear reduction and increases torque, and realizes anti-rotation stability by aligning bearing, solve the problem that dismounting efficiency is low, safety is poor, workpiece is easily damaged, with the advantages of pulling pin force, safe and reliable, protect workpiece.

Description

Technical Field

[0001] This utility model relates to the field of internal thread cylindrical pin technology, and in particular to a device for disassembling internal thread cylindrical pins. Background Technology

[0002] In large mechanical equipment or precision components, internally threaded cylindrical pins are widely used positioning and connecting parts. They are usually tightly mounted on the base of a housing. As the equipment ages, these cylindrical pins must be removed from the housing during maintenance, repair, or component replacement. In existing technology, the most common disassembly method relies on manual labor using hammers or punches to violently strike the pins in an attempt to loosen them or knock them out directly.

[0003] However, this traditional, brutal disassembly method has obvious drawbacks. For cylindrical pins with high installation precision and tight fit, pure impact force is often insufficient to loosen them, resulting in extremely low disassembly efficiency and high physical labor consumption. Repeated and violent hammering can easily cause the end face of the cylindrical pin to deform, turn black, or even damage its internal threads, making subsequent disassembly work more difficult. At the same time, uncontrollable impact force can also cause permanent damage to the housing itself, especially the precision pin holes on the housing.

[0004] Therefore, this utility model proposes a device for disassembling internally threaded cylindrical pins to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems of low disassembly efficiency, poor operation safety, and easy damage to the cylindrical pin or housing in the existing disassembly device for internal thread cylindrical pin, this utility model aims to provide a disassembly device for internal thread cylindrical pin with improved structure that can effectively solve the above problems.

[0006] This utility model provides a device for disassembling internally threaded cylindrical pins, comprising: a pin-pulling box; a second gear shaft rotatably disposed within the pin-pulling box; an output end connected to one end of the second gear shaft; a first self-aligning bearing and a third self-aligning bearing respectively mounted on both axial ends of the second gear shaft and supporting the second gear shaft on the pin-pulling box; a first gear shaft rotatably disposed within the pin-pulling box and meshing with the second gear shaft; and a second self-aligning bearing mounted on the first gear shaft and supporting the first gear shaft on the pin-pulling box.

[0007] The device for disassembling internally threaded cylindrical pins also includes a threaded shaft rotatably disposed within the pin-pulling box; a one-way thrust ball bearing and a one-way thrust ball bearing 2 coaxially disposed on the threaded shaft and abutting against the inner wall of the pin-pulling box; and a screw that passes through the threaded shaft and is threadedly engaged with it, one end of the screw being used to connect to the internally threaded cylindrical pin.

[0008] In the transmission assembly, the gear shaft drives the one-way thrust ball bearing and the two-way thrust ball bearing to rotate, which in turn drives the threaded shaft to rotate, thus realizing the transmission of power from the gear shaft to the threaded shaft.

[0009] In the anti-rotation structure, the self-aligning bearing one, the self-aligning bearing two, and the self-aligning bearing three are used to restrict the pin-pulling box from rotating when the gear shaft one and the gear shaft two rotate, thus ensuring the stability of the pin-pulling operation.

[0010] Preferably, the device for disassembling internally threaded cylindrical pins further includes a pad block, which is detachably disposed at the bottom end of the pin-pulling box. The pad block is used to abut against the box body where the internally threaded cylindrical pin is located during disassembly, providing the necessary travel space for the pin to be pulled out.

[0011] Preferably, the end of the screw used to connect to the internally threaded cylindrical pin is provided with an external thread, the specification of which matches the internal thread hole of the internally threaded cylindrical pin, for screwing into the internal thread hole to achieve a firm connection.

[0012] Preferably, the second gear shaft includes a gear portion and a shaft portion, the output end is fixedly connected to one end of the shaft portion to receive power, and the gear portion meshes with the first gear shaft to transmit power.

[0013] Preferably, the one-way thrust ball bearing and the one-way thrust ball bearing are spaced apart along the axial direction of the threaded shaft and respectively abut against the opposite inner walls of the pin-pulling box. The structure is designed to jointly and stably bear the huge axial thrust generated by the screw when the cylindrical pin is pulled out.

[0014] Preferably, the first gear shaft includes a gear portion and a shaft portion, the gear portion meshing with the second gear shaft to receive power, and the shaft portion being used to drive the first one-way thrust ball bearing and the second one-way thrust ball bearing to rotate.

[0015] Preferably, the threaded shaft has a hollow structure, and the screw passes through the hollow part of the threaded shaft and engages with the inner thread of the threaded shaft. The axial pull-out movement is achieved by driving the screw through the rotation of the threaded shaft.

[0016] Preferably, the outer rings of the self-aligning bearing 1, the self-aligning bearing 2, and the self-aligning bearing 3 are all fixed to the pin box, and the inner rings of the self-aligning bearings are respectively fixedly connected to the gear shaft 1 or the gear shaft 2. The relative rotation of the inner and outer rings of the bearings realizes the function of supporting rotation and restricting the rotation of the housing.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting up a gear reduction and torque amplification transmission mechanism composed of a gear shaft two, a gear shaft one, a one-way thrust ball bearing and a threaded shaft, drives the screw to generate huge axial tensile force, which solves the problems of insufficient force and low efficiency of manual hammering or ordinary tools in the prior art, and achieves the technical effect of labor saving, high efficiency and controllable pulling force.

[0018] 2. This utility model, by setting self-aligning bearing 1, self-aligning bearing 2 and self-aligning bearing 3 on the pin pulling box to support the rotation of gear shaft 1 and gear shaft 2, and by using the method of fixing the outer ring of the self-aligning bearing to the pin pulling box and the inner ring to the gear shaft, solves the problem in the prior art that the pin pulling tool is prone to overall rotation when torque is applied, which leads to unstable operation or danger, and achieves the technical effect of safe and reliable pin pulling process and high tool stability.

[0019] 3. This utility model uses dedicated one-way thrust ball bearings 1 and 2 to withstand the huge axial reaction force generated when the screw pulls out the pin, and uses pads to provide stable support and pull-out space between the pin pulling box and the box body. This solves the problem that the traditional hammering method is prone to damage to the cylindrical pin or the box body hole, and realizes smooth and impact-free disassembly of internal thread cylindrical pins, effectively protecting the workpiece. Attached Figure Description

[0020] Figure 1 This is a perspective view of a device for disassembling internally threaded cylindrical pins proposed in this utility model.

[0021] Figure 2 This is a partial structural diagram of the pad block for disassembling an internally threaded cylindrical pin device proposed in this utility model.

[0022] Figure 3 This is a partial structural disassembly diagram of a gear shaft of a disassembled internal thread cylindrical pin device proposed in this utility model.

[0023] Figure 4 This is a partial structural disassembly diagram of a gear shaft for disassembling an internally threaded cylindrical pin device proposed in this utility model.

[0024] Explanation of reference numerals in the attached figures: 1. Housing; 2. Internal threaded cylindrical pin; 3. Spacer block; 4. Screw; 5. Threaded shaft; 6. Gear shaft one; 7. Gear shaft two; 8. Pin puller box; 9. Self-aligning bearing one; 10. One-way thrust ball bearing one; 11. Self-aligning bearing two; 12. Output end; 13. Self-aligning bearing three; 14. One-way thrust ball bearing two. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example: Please refer to Figures 1 to 4 This utility model provides a device for disassembling internally threaded cylindrical pins. The device includes a pin-pulling box 8 and a gear shaft 7 rotatably disposed in the pin-pulling box 8. The pin-pulling box 8 serves as the mounting housing of the entire device and accommodates the internal transmission mechanism. The gear shaft 7 is used to receive external power and start the transmission.

[0027] To solve the above-mentioned technical problems, the technical solution of this embodiment is that the device for disassembling the internal thread cylindrical pin also includes a gear shaft 6, and the gear shaft 6 and the aforementioned gear shaft 7 form a meshing transmission connection relationship, and a pin pulling actuator composed of a threaded shaft 5 and a screw 4 is provided.

[0028] Please refer to Figure 1 , Figure 3 and Figure 4 The output end 12 is connected to one end of the gear shaft 7 and is used to receive hydraulic power. The self-aligning bearing 9 and the self-aligning bearing 13 are respectively installed on the two axial ends of the gear shaft 7 and support the gear shaft 7 on the pin box 8. The gear shaft 6 is rotatably set in the pin box 8. The self-aligning bearing 11 is installed on the gear shaft 6 and supports the gear shaft 6 on the pin box 8. The gear shaft 6 meshes with the gear shaft 7 for transmission.

[0029] The device also includes a threaded shaft 5 rotatably disposed in the pin-pulling box 8. One-way thrust ball bearing 10 and one-way thrust ball bearing 14 are coaxially disposed on the threaded shaft 5 and abut against the inner wall of the pin-pulling box 8. Gear shaft 6 drives the one-way thrust ball bearing 10 and one-way thrust ball bearing 14 to rotate, thereby driving the threaded shaft 5 to rotate. Screw 4 passes through the threaded shaft 5 and is threadedly engaged with it. One end of screw 4 is used to connect to the internally threaded cylindrical pin 2.

[0030] The outer rings of self-aligning bearing 19, self-aligning bearing 21, and self-aligning bearing 313 are all fixed to the pin-pulling box 8, and the inner rings are fixedly connected to gear shaft 16 or gear shaft 27 respectively. This structure is used to restrict the pin-pulling box 8 from rotating when gear shaft 16 and gear shaft 27 rotate, thus ensuring the stability of the pin-pulling operation.

[0031] As a preferred embodiment, please refer to Figure 1 and Figure 2 The device also includes a pad 3, which is detachably disposed at the bottom of the pin-pulling box 8. The pad 3 is used to abut against the box 1 where the internal threaded cylindrical pin 2 is located during disassembly.

[0032] In a preferred embodiment, the end of the screw 4 used to connect to the internally threaded cylindrical pin 2 is provided with an external thread, which is used to screw into the internally threaded hole of the internally threaded cylindrical pin 2.

[0033] As a preferred embodiment, please refer to Figure 3 The gear shaft 7 includes a gear part and a shaft part. The output end 12 is fixedly connected to one end of the shaft part, and the gear part meshes with the gear shaft 6.

[0034] Please refer to Figure 4 The gear shaft 6 includes a gear section and a shaft section. The gear section meshes with the gear shaft 7, and the shaft section is used to drive the rotation of the one-way thrust ball bearing 10 and the one-way thrust ball bearing 14.

[0035] In a preferred embodiment, the threaded shaft 5 has a hollow structure, and the screw 4 passes through the hollow part of the threaded shaft 5 and is threadedly engaged with the inner wall thread of the threaded shaft 5.

[0036] In a preferred embodiment, the one-way thrust ball bearing 10 and the one-way thrust ball bearing 14 are spaced apart along the axial direction of the threaded shaft 5 and respectively abut against the opposite inner walls of the pin-pulling box 8 to jointly bear the axial thrust generated when the screw 4 is pulled out.

[0037] Working principle: First, the screw 4 is inserted into the threaded shaft 5, and by rotating it, the screw 4 is screwed into the internal threaded cylindrical pin 2. Then, the pad 3 on the pin-pulling box 8 is placed on the box 1 to be disassembled. The pad 3 provides distance for disassembling the internal threaded cylindrical pin 2. Then, hydraulic pressure is used as the power input. At this time, the output end 12 will rotate. Then, the output end 12 drives the gear shaft 7 to rotate. At the same time, the self-aligning bearing 9 and the self-aligning bearing 13 ensure that the pin-pulling box 8 will not rotate. Meanwhile, the gear shaft 7 drives the gear shaft 6 to rotate. At this time, the gear shaft 6 drives the one-way thrust ball bearing 10 and the one-way thrust ball bearing 14 to rotate, and drives the threaded shaft 5 to rotate. At this time, the screw 4 will drive the internal threaded cylindrical pin 2 away from the box 1. At the same time, the self-aligning bearing 11 can also prevent the pin-pulling box 8 from rotating, thus realizing the safe and reliable removal of the cylindrical pin on the box 1.

Claims

1. A device for disassembling internally threaded cylindrical pins, comprising: Pin puller box (8), gear shaft two (7), the gear shaft two (7) is rotatably disposed in the pin puller box (8), output end (12), the output end (12) is connected to one end of the gear shaft two (7), self-aligning bearing one (9) and self-aligning bearing three (13), the self-aligning bearing one (9) and the self-aligning bearing three (13) are respectively installed at both ends of the axial direction of the gear shaft two (7) and support the gear shaft two (7) on the pin puller box (8); The device is characterized by having a gear shaft (6) rotatably disposed within the pin-pulling box (8) and meshing with a gear shaft (7); a self-aligning bearing (11) mounted on the gear shaft (6) and supporting the gear shaft (6) on the pin-pulling box (8); and a threaded shaft (5) rotatably disposed within the pin-pulling box (8). The device also includes a one-way thrust ball bearing (10) and a one-way thrust ball bearing (14). The one-way thrust ball bearing (10) is coaxially mounted on the threaded shaft (5) and abuts against the inner wall of the pin box (8). The gear shaft (6) drives the one-way thrust ball bearing (10) and the one-way thrust ball bearing (14) to rotate the threaded shaft (5). The device also includes a screw (4). The screw (4) passes through the threaded shaft (5) and is threadedly engaged with it. One end of the screw (4) is used to connect an internally threaded cylindrical pin (2).

2. The device for disassembling internally threaded cylindrical pins according to claim 1, characterized in that, The device also includes a pad (3), which is detachably disposed at the bottom end of the pin box (8) and is used to abut against the box (1) where the internal thread cylindrical pin (2) is located during disassembly.

3. The device for disassembling internally threaded cylindrical pins according to claim 1, characterized in that, The screw (4) is provided with an external thread at one end for connecting the internal thread cylindrical pin (2) and is used to screw into the internal thread hole of the internal thread cylindrical pin (2).

4. The device for disassembling internally threaded cylindrical pins according to claim 1, characterized in that, The second gear shaft (7) includes a gear part and a shaft part. The output end (12) is fixedly connected to one end of the shaft part. The gear part meshes with the first gear shaft (6).

5. The device for disassembling internally threaded cylindrical pins according to claim 1, characterized in that, The one-way thrust ball bearing (10) and the one-way thrust ball bearing (14) are spaced apart along the axial direction of the threaded shaft (5) and respectively abut against the relative inner walls of the pin-pulling box (8) to jointly bear the axial thrust generated when the screw (4) is pulled out.

6. The device for disassembling internally threaded cylindrical pins according to claim 1, characterized in that, The gear shaft one (6) includes a gear part and a shaft part. The gear part meshes with the gear shaft two (7). The shaft part is used to drive the one-way thrust ball bearing one (10) to rotate.

7. The device for disassembling internally threaded cylindrical pins according to claim 1, characterized in that, The threaded shaft (5) has a hollow structure, and the screw (4) passes through the hollow part of the threaded shaft (5) and engages with the inner thread of the threaded shaft (5).

8. The device for disassembling internally threaded cylindrical pins according to claim 1, characterized in that, The outer rings of the self-aligning bearing 1 (9), self-aligning bearing 2 (11) and self-aligning bearing 3 (13) are all fixed to the pin box (8) and are respectively fixedly connected to the gear shaft 1 (6) or the gear shaft 2 (7).

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