A pin removal device

Abstract

The utility model provides a pin pulling device, comprising a bottom plate and a pull ring fixed on the bottom plate, wherein the bottom plate is provided with a first slot through which the head and the rod of the positioning pin can pass and a second slot through which the rod of the positioning pin can pass but the head of the positioning pin cannot pass, and the first slot is connected with the second slot. The first slot of the utility model can pass through the head of the positioning pin, and the bottom plate is moved so that the head of the positioning pin is stuck in the second slot, and the pull ring can be better connected with the tension device to avoid falling off during connection and causing harm to construction personnel.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a pin pulling device. Background Art

[0002] The fixing pin of the hydraulic support side guard plate is a special pin shaft used to fix the top beam or side guard plate of the hydraulic support. The pin shaft must be removed when installing or repairing the side guard plate of the hydraulic support. The main method of pulling out the fixing pin of the side guard plate is to use a hand winch to forcibly pull out the fixing pin; or use a hammer to pull out the fixing pin by relying on the inertial impact force. In the above two methods, during the process of pulling out the fixing pin, the connection between the hand winch or the hammer and the fixing pin is easy to fall off, causing harm to the construction workers, and during the pulling out process, the safety of the workers is low, the labor intensity is high, and the labor efficiency is low.

[0003] Therefore, the prior art needs to be further developed. Utility Model Content

[0004] The utility model provides a pin pulling device, and the specific implementation methods are as follows:

[0005] A pin pulling device comprises: a base plate and a pull ring fixed on the base plate, wherein the base plate is provided with a first slot hole through which the head and the rod of the locating pin can pass, and a second slot hole through which the rod of the locating pin can pass but the head of the locating pin cannot pass, and the first slot hole is connected with the second slot hole.

[0006] Furthermore, the first slot hole and the second slot hole are combined to form a gourd-shaped hole, and the aperture of the first slot hole is larger than the aperture of the second slot hole.

[0007] Furthermore, the bottom plate is an elliptical structure or a circular structure, and the gourd-shaped hole is located at the center of the bottom plate.

[0008] Furthermore, the pull ring is an arched structure, and the middle portion of the pull ring is arranged corresponding to the second slot.

[0009] Furthermore, the pull ring is arranged perpendicular to the bottom plate.

[0010] Furthermore, the pull ring is fixed to the bottom plate by welding.

[0011] Furthermore, the thickness of the bottom plate is 10 mm.

[0012] Furthermore, a plurality of anti-slip protrusions are arranged on the outer periphery of the pull ring.

[0013] Furthermore, a third slot hole is provided on the bottom plate, through which the rod of the positioning pin can pass but the head of the positioning pin cannot pass, the first slot hole is connected to the third slot hole, and the aperture of the third slot hole is smaller than the aperture of the second slot hole.

[0014] Beneficial effects:

[0015] 1. The pin pulling device of the utility model connects the positioning pin and the pull ring through the bottom plate, and the pull ring is connected to the tension device, so that the construction workers can save more effort during construction, reduce labor intensity and improve labor efficiency.

[0016] 2. In the utility model, the head of the locating pin is firmly clamped on the second slot hole by the cooperation of the first slot hole and the second slot hole, so that when the pin pulling device pulls out the locating pin, the locating pin is prevented from falling off from the pin pulling device and causing harm to the construction personnel.

[0017] 3. The setting of the pull ring of the utility model makes it difficult for the pin pulling device of the utility model to fall off when connected with the tension device, thereby improving the safety during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the pin pulling device of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the pull ring of the utility model;

[0020] Figure 3 It is a schematic diagram of the pin pulling process of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the third slot hole of the utility model.

[0022] The above drawings include the following reference numerals:

[0023] 1. Bottom plate; 11. First slot hole; 12. Second slot hole; 13. Third slot hole; 2. Pull ring; 21. Anti-slip protrusion; 3. Rod of locating pin; 4. Lifting hook head; 5. Head of locating pin. DETAILED DESCRIPTION

[0024] The following describes the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments:

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0027] According to an embodiment of the utility model, a pin pulling device is provided. Figures 1 to 4 , comprising: a base plate 1 and a pull ring 2 fixed on the base plate 1, the base plate 1 is provided with a first slot 11 through which the head 5 and the rod 3 of the locating pin can pass, and a second slot 12 through which the rod 3 of the locating pin can pass but the head 5 of the locating pin cannot pass, and the first slot 11 is connected to the second slot 12. The size of the head 5 of the locating pin in this embodiment is larger than the rod 3 of the locating pin. Since the aperture of the first slot 11 is larger than the head 5 of the locating pin, the first slot 11 can pass through the head 5 of the locating pin, so that the head 5 of the locating pin is located above the base plate, and the base plate is moved at this time, so that the locating pin enters the second slot 12, and since the aperture of the second slot 12 is smaller than the head 5 of the locating pin and larger than the rod 3 of the locating pin, the head 5 of the locating pin is stuck above the second slot 12, and then the pull ring 2 is hung by the tension device to pull out the locating pin. This arrangement makes the construction personnel more labor-saving during construction, reduces the labor intensity, improves the labor efficiency, and prevents the locating pin from falling off from the pin pulling device, causing harm to the construction personnel.

[0028] Preferably, see Figure 3 The pulling device can be a hand chain hoist, and the lifting hook head 4 of the hand chain hoist is used to hang the pull ring 2, and the hand chain hoist is started to pull out the positioning pin.

[0029] Specifically, the first slot 11 and the second slot 12 of this embodiment are combined to form a gourd-shaped hole, and the aperture of the first slot 11 is larger than the aperture of the second slot 12. The first slot 11 passes through the head 5 and the rod 3 of the positioning pin, and the bottom plate 1 is moved to allow the positioning pin to enter the second slot 12, and the head 5 of the positioning pin is then clamped by the second slot 12 to fix the positioning pin. This arrangement allows the positioning pin to be inserted into the pin pulling device of this embodiment, and the positioning pin can be fixed. The operation is simple and the structure is stable, which improves the safety of the pin pulling device of this embodiment and makes it difficult for the positioning pin to fall off from the second slot 12.

[0030] Specifically, the bottom plate 1 of this embodiment is an elliptical structure or a circular structure, and the gourd-shaped hole is located at the center of the bottom plate 1. The setting of the elliptical structure or the circular structure of the bottom plate 1 can make the gourd-shaped hole located at the center of the bottom plate 1, and at the same time, the bottom plate 1 does not occupy too large an area, so that the pin pulling device of this embodiment will not affect other workpieces due to the large area of ​​the bottom plate 1 during use, thereby enhancing practicality. The gourd-shaped hole is located at the center, so that when pulling the pin, the force point of the positioning pin is located at the center of the bottom plate, which saves more effort when pulling the pin.

[0031] Specifically, see Figure 1 and Figure 2 The pull ring 2 of this embodiment is an arched structure, and the middle part of the pull ring 2 is arranged corresponding to the second slot 12. The pull ring 2 is arranged in an arched structure, so that the lifting hook head 4 of the hand chain hoist can more stably hook the pull ring 2 to pull the pin; and when pulling the pin, the bottom plate 1 is moved, and the positioning pin enters the second slot 12, and the second slot 12 clamps the head 5 of the positioning pin. Because the pull ring 2 is arranged corresponding to the second slot 12, the pulling force 2 applied by the hand chain hoist to the pull ring 2 can pull the positioning pin, and the positioning pin will be more stably stuck on the second slot 12 during the pulling process due to the corresponding arrangement of the pull ring 2 and the second slot 12. This arrangement enhances the stability of the positioning pin in the pin pulling device of this embodiment, and at the same time improves the safety during construction.

[0032] Specifically, the pull ring 2 of this embodiment is arranged perpendicular to the bottom plate 1. In this way, the positioning pin receives uniform pulling force during the pulling process, and the positioning pin will not slide from the second slot hole 12 to the first slot hole 11 due to uneven force, thereby causing an accident and causing harm to the construction workers.

[0033] Specifically, the pull ring 2 of this embodiment is fixed to the bottom plate 1 by welding. The pull ring 2 is welded to the steel plate. The pull ring 2 is fixed to the bottom plate 1 by welding, which has better fixation and can reduce the use of connecting parts, so that the pin pulling device of this embodiment does not occupy too large an area, does not affect other workpieces when in use, and also saves production costs.

[0034] Specifically, the bottom plate 1 of this embodiment has a thickness of 10 mm. The bottom plate 1 of this embodiment is made of a 10 mm thick steel plate, and holes and grooves are cut on the bottom plate 1 according to the size of the head 5 and the rod 3 of the positioning pin. The production method is simple and the cost is low. The bottom plate 1 can be processed and manufactured according to the model of the positioning pin, and has a wide range of applications.

[0035] Specifically, see Figure 2 and Figure 3The outer periphery of the pull ring 2 of this embodiment is provided with a plurality of anti-skid protrusions 21. When the pulling device pulls the pull ring 2, the anti-skid protrusions 21 will increase the friction between the pull ring 2 and the pulling device, making it difficult for the pin pulling device of this embodiment to fall off from the pulling device, thereby improving the safety of the construction.

[0036] Specifically, see Figure 4 The bottom plate 1 of this embodiment is also provided with a third slot 13 through which the rod 3 of the locating pin can pass but the head 5 of the locating pin cannot pass. The first slot 11 is connected to the third slot 13, and the aperture of the third slot 13 is smaller than the aperture of the second slot 12. For smaller locating pins, the bottom plate 1 is moved to make the head 5 of the locating pin stuck on the third slot 13, and then the lifting hook 4 of the hand chain hoist is used to hook the pull ring 2 to pull out the locating pin. With this arrangement, different slots can be selected for pulling out the pins according to different models, which expands the scope of application of the pin pulling device of this embodiment.

[0037] The specific use process of the pin pulling device is as follows:

[0038] First, pull out the U-shaped pin on the side guard plate of the hydraulic support, then align the first slot 11 with the head 5 of the locating pin, and put the ring around the head 5 of the locating pin, then move the bottom plate 1 to move the locating pin to the second slot 12 or the third slot 13. At this time, the head 5 of the locating pin is stuck on the second slot 12 or the third slot 13, and then use the lifting hook head 4 of the hand chain hoist to hook the pull ring 2, start the hand chain hoist to pull up the pin pulling device of this embodiment, thereby driving the locating pin to be pulled, and then pull out the locating pin.

[0039] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.

Claims

1. A pin pulling device, characterized in that: It includes a base plate and a pull ring fixed on the base plate, wherein the base plate is provided with a first slot hole through which the head and the rod of the locating pin can pass, and a second slot hole through which the rod of the locating pin can pass but the head of the locating pin cannot pass, and the first slot hole is connected to the second slot hole.

2. The pin pulling device according to claim 1, characterized in that: The first slot hole and the second slot hole are combined to form a hole, and the hole diameter of the first slot hole is larger than the hole diameter of the second slot hole.

3. The pin pulling device according to claim 2, characterized in that: The bottom plate is an elliptical structure or a circular structure, and the hole is located at the center of the bottom plate.

4. The pin pulling device according to claim 1, characterized in that: The pull ring is an arched structure, and the middle portion of the pull ring is arranged corresponding to the second slot.

5. The pin pulling device according to claim 1, characterized in that: The pull ring is arranged perpendicular to the bottom plate.

6. The pin pulling device according to claim 5, characterized in that: The pull ring is fixed to the bottom plate by welding.

7. The pin pulling device according to claim 1, characterized in that: The thickness of the bottom plate is 10 mm.

8. The pin pulling device according to claim 1, characterized in that: A plurality of anti-slip protrusions are arranged on the outer periphery of the pull ring.

9. The pin pulling device according to claim 1, characterized in that: The bottom plate is also provided with a third slot hole through which the rod of the positioning pin can pass but the head of the positioning pin cannot pass, the first slot hole is connected to the third slot hole, and the aperture of the third slot hole is smaller than the aperture of the second slot hole.

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