A large elastic snap ring dismounting tool and method

Abstract

The application discloses a large elastic snap ring dismounting tool, which comprises a left clamp body and a right clamp body, the left clamp body and the right clamp body are hinged through a pin shaft, the middle parts of the left clamp body and the right clamp body are installed in the holes of a guide frame and are positioned through a pressing plate, a support groove is welded on the top of the guide frame and is used for placing and supporting a hydraulic cylinder, the hydraulic cylinder provides power for the left clamp body and the right clamp body; the end parts of the left clamp body and the right clamp body are provided with clamp heads, which are used for adapting to different types of snap rings; an annular groove is arranged between the clamp head and the pin shaft, after the snap ring is strongly and elastically deformed to a required size, a bolt installed in the annular groove is tightened to fix the distance between the clamp heads; the two clamp heads are driven by the hydraulic cylinder to make the snap ring elastically deform, so that the dismounting and mounting of the snap ring are facilitated; the elastic deformation capacity of the clamp body to the snap ring is adjusted, and the clamp body is used for dismounting and mounting the snap ring with large specifications, types and strong elasticity; the dismounting and mounting capacity is strong, and the efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of equipment maintenance, and particularly relates to a large elastic snap ring dismounting tool and method. BACKGROUND

[0002] There are four bearings in each cross pack assembly of the main transmission universal joint shaft of a strip mill, each bearing is axially fixed by an elastic snap ring, and the snap ring is installed in a bearing seat clamping groove. Since the specifications and models are large, the elastic force is strong, and the structure design is limited, the dismounting and installation are difficult, and generally, the maintenance and assembly are performed at the joint shaft manufacturer. However, after the joint shaft is used on the machine for a certain period of time, the elastic snap ring will be weakened or even fail in axial fixation due to reasons such as wear and rust, and needs to be repaired and replaced according to the on-site use, otherwise accidents will occur. Since there is no special tool on site, and the working environment on site is limited, the repair and replacement of the snap ring are difficult or impossible.

[0003] The existing tool and method generally use a manual flat crowbar. When installing, a small part of the snap ring is first installed into the bearing seat clamping groove, and then the flat crowbar is gradually pressed against the edge of the snap ring to pry and press the snap ring into the clamping groove. When dismounting, one end of the round crowbar is inserted into one hole of the snap ring to pry out one end of the snap ring from the clamping groove, and then the flat crowbar is inserted between the snap ring and the bearing seat to gradually pry out the remaining snap ring from the clamping groove. The existing technical method is low in efficiency and has certain safety hazards. The snap ring is easy to bounce out due to elastic deformation, and it is more difficult to install larger specifications and models of the snap ring with stronger elastic force. SUMMARY

[0004] The present application aims to provide a large elastic snap ring dismounting tool and method.

[0005] The technical solution adopted by the present application to solve the technical problem is: a large elastic snap ring dismounting tool, comprising a left jaw body and a right jaw body, the left jaw body and the right jaw body are hinged through a pin shaft, the middle parts of the left jaw body and the right jaw body are installed in the holes of a guide frame and positioned through a pressing plate, the top of the guide frame is welded with a support groove for placing and supporting a hydraulic cylinder, and the hydraulic cylinder provides power for the left jaw body and the right jaw body; the end parts of the left jaw body and the right jaw body are provided with jaw heads for adapting to different models of snap rings.

[0006] Specifically, an annular groove is arranged between the jaw heads and the pin shaft, and after the snap ring is strongly and elastically deformed to the required size, a bolt installed in the annular groove is tightened to fix the distance between the jaw heads.

[0007] Specifically, handles are arranged at the top parts of the left jaw body and the right jaw body for holding and moving the left jaw body and the right jaw body.

[0008] A large elastic snap ring dismounting method, comprising the following steps:

[0009] 1) First, according to the size model and elasticity of the snap ring, calculate and select a suitable hydraulic pump to provide driving pressure for the hydraulic cylinder, and select a suitable size of the jaw;

[0010] 2) Install the snap ring: first put a part of the snap ring into the clamping groove of the bearing seat, then insert the jaw into the mounting hole of the snap ring, start the hydraulic pump to drive the hydraulic cylinder to exert force on the left jaw body and the right jaw body, so that the distance between the two jaws becomes smaller, thereby making the snap ring elastically deformed and the diameter size smaller, and gradually installing the snap ring into the clamping groove of the bearing seat, after the snap ring is completely installed into the clamping groove, the hydraulic pump is released, the snap ring restores to the original size and shape, and the jaw is pulled out of the mounting hole of the snap ring, completing the installation work;

[0011] 3) Disassemble the snap ring: insert the jaw into the mounting hole of the snap ring, start the hydraulic pump to drive the hydraulic cylinder to exert force on the left jaw body and the right jaw body, so that the distance between the two jaws becomes smaller, thereby making the snap ring elastically deformed and the diameter size smaller, and gradually disassembling the snap ring from the clamping groove of the bearing seat from one end of the snap ring.

[0012] The present application has the following beneficial effects: the use of hydraulic cylinder to drive two jaws to make the snap ring elastically deformed, so as to facilitate the disassembly and installation of the snap ring; the pressure of the hydraulic pump can be adjusted according to the specifications, model and elasticity of the snap ring, and the elastic deformation ability of the jaw to the snap ring can be adjusted, and it is used for disassembly and assembly of large size and strong elastic snap ring; the disassembly and installation ability is strong and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of a large elastic snap ring disassembly and assembly tool.

[0014] Figure 2 It is a structural schematic view of A in Figure 1

[0015] Figure 3 It is a structural schematic view of a snap ring.

[0016] Figure 4 It is a structural schematic view of a snap ring assembly.

[0017] In the figure: 1-left jaw body; 2-right jaw body; 3-pivot; 4-fixing groove; 5-jaw; 6-guide frame; 7-pressing plate; 8-supporting groove; 9-hydraulic cylinder; 10-handle; 11-snap ring; 12-snap ring mounting hole; 13-bearing; 14-bearing seat; 15-shaft head. DETAILED DESCRIPTION

[0018] The present application will now be further described in detail with reference to the accompanying drawings.

[0019] As Figures 1-4 ​A large elastic snap ring dismounting tool, comprising a left jaw body 1, a right jaw body 2, a pin shaft 3, a fixed groove 4, a jaw head 5, a guide frame 6, a pressing plate 7, a supporting groove 8, a hydraulic cylinder 9, a handle 10 and a hydraulic pump.

[0020] The left jaw body 1 and the right jaw body 2 are hinged and positioned by the pin shaft 3 and rotate around it to increase or decrease the distance between the two jaw heads 5, the left jaw body 1 and the right jaw body 2 are respectively installed in the square hole of the guide frame 6 and positioned by the pressing plate 7; the jaw head 5 is screwed on the left and right jaw bodies with a threaded hole, which is a series of threaded cylindrical bodies with different diameters, which can be used for different sizes of snap ring mounting hole; the fixed groove 4 is a long strip annular groove, which can be tightened after the left jaw body 1 and the right jaw body 2 are forced to elastically deform the snap ring to the required size to prevent the distance between the two jaw heads 5 from changing; the supporting groove 8 is welded with the guide frame 6 to place and support the hydraulic cylinder 9, the power source of the hydraulic cylinder 9 is provided by the hydraulic pump; the hydraulic cylinder 9 is used to apply force to the left jaw body 1 and the right jaw body 2 to overcome the elastic deformation force of the snap ring and reduce the diameter of the snap ring, the contact force applying parts at both ends of the hydraulic cylinder 9 and the left and right jaw bodies are semicircular structures, which do not slip when the position changes after the left and right jaw bodies are forced; two handles 10 are respectively welded on the left jaw body 1 and the right jaw body 2, which are convenient for holding and moving the jaw body.

[0021] A large elastic snap ring dismounting method:

[0022] 1) First, calculate and select the appropriate hydraulic pump driving pressure according to the size and elasticity of the snap ring, and select the appropriate size of the jaw head 5;

[0023] 2) Install the snap ring: first put part of the snap ring 11 into the clamping groove of the bearing seat 14, then insert the jaw head 5 into the mounting hole 12 of the snap ring 11, start the hydraulic pump to drive the hydraulic cylinder 9 to apply force to the left jaw body 1 and the right jaw body 2, so that the distance between the two jaw heads 5 becomes smaller, thereby making the snap ring 11 elastically deformed and the diameter size smaller, and gradually installing the snap ring 11 into the clamping groove of the bearing seat 14, after the snap ring 11 is completely installed into the clamping groove, the hydraulic pump is depressurized, the snap ring 11 returns to its original size and shape, and the jaw head 5 is pulled out of the mounting hole of the snap ring 11, completing the installation work;

[0024] 3) Disassemble the snap ring: insert the jaw head 5 into the mounting hole 12 of the snap ring 11, start the hydraulic pump to drive the hydraulic cylinder to apply force to the left jaw body 1 and the right jaw body 2, so that the distance between the two jaw heads 5 becomes smaller, thereby making the snap ring 11 elastically deformed and the diameter size smaller, and gradually disassembling the snap ring from the clamping groove of the bearing seat 14 from one end of the snap ring;

[0025] 4) During the installation and disassembly operation, the hydraulic pump should apply force slowly and evenly, and prevent the jaw head 5 from coming out of the mounting hole of the snap ring, the operation should comply with the safety specifications of the hydraulic pump, hydraulic cylinder and other equipment, and the personnel operation and position should be safe and reasonable.

[0026] The application is not limited to the above-mentioned embodiments, and any person should know that the structural changes made under the inspiration of the application, any technical solutions with the same or similar to the application, fall within the protection scope of the application.

[0027] The technology, shape, and structure parts not described in detail in the application are well-known technology.

Claims

1. A large elastic snap ring dismounting tool, characterized in that, The left and right clamping bodies are hinged by a pin shaft, the middle part of the left and right clamping bodies is installed in a square hole of a guide frame, and is positioned by a pressing plate, the square hole is opened along the opening and closing direction of the left and right clamping bodies, the top of the guide frame is welded with a supporting groove for placing and supporting a hydraulic cylinder, and the hydraulic cylinder provides power for the left and right clamping bodies; the end part of the left and right clamping bodies is provided with a clamp head for adapting to different types of clamping rings. A large elastic clamping ring dismounting method comprises the following steps: 1) firstly, according to the size and elasticity of the clamping ring, a suitable hydraulic pump is selected to provide driving pressure for the hydraulic cylinder, and a clamp head with a suitable size is selected; 2) installing the clamping ring: a part of the clamping ring is first placed in the clamping groove of the bearing seat, then the clamp head is inserted into the mounting hole of the clamping ring, the hydraulic pump is started to drive the hydraulic cylinder to apply force to the left and right clamping bodies, so that the distance between the two clamp heads becomes smaller, the clamping ring is elastically deformed to become smaller in diameter, and the clamping ring is gradually installed into the clamping groove of the bearing seat, after the clamping ring is completely installed into the clamping groove, the hydraulic pump is released, the clamping ring returns to its original size and shape, the clamp head is pulled out of the mounting hole of the clamping ring, and the installation work is completed; 3) dismounting the clamping ring: the clamp head is inserted into the mounting hole of the clamping ring, the hydraulic pump is started to drive the hydraulic cylinder to apply force to the left and right clamping bodies, so that the distance between the two clamp heads becomes smaller, the clamping ring is elastically deformed to become smaller in diameter, and the clamping ring is gradually dismounted from the clamping groove of the bearing seat from one end of the clamping ring.

2. A large elastic circlip dismounting tool according to claim 1, characterized in that, An annular groove is arranged between the clamp head and the pin shaft, after the clamping ring is elastically deformed to the required size, the bolt installed in the annular groove is tightened to fix the distance between the two clamp heads.

3. A large elastic circlip dismounting tool according to claim 1, characterized in that, The top of the left and right clamping bodies is provided with a handle for holding and moving the left and right clamping bodies.

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