Pneumatic assembling tool for maintaining crank arm bearing

Abstract

The utility model provides a pneumatic assembling tool for maintaining a crank arm bearing, and belongs to the technical field of tool clamps. Comprising a frame body, the frame body is of a door-shaped structure, an air cylinder is fixedly arranged on the upper portion of the frame body, the central axis of the air cylinder is vertical, a piston rod on the lower portion of the air cylinder is fixedly connected with a pressing head, and the pressing head and the central axis of the air cylinder are coaxial; and the upper part of the fixed tool plate is provided with a positioning structure for positioning the holding crank arm and ensures that a bearing mounting hole in the holding crank arm is aligned and coaxial with the pressure head up and down after the holding crank arm is positioned. The pneumatic tool is designed for maintaining the assembling of the bearing of the crank arm, the problem that the assembling of the bearing of the crank arm is time-consuming and labor-consuming is greatly solved, the working efficiency is improved, the structure is simple, and the operation and the use are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling, and in particular relates to a pneumatic assembly tool for holding a crank arm bearing. Background Art

[0002] High-voltage circuit breakers are responsible for the protection and control of overload, short circuit and other issues of power equipment in high-voltage power supply and distribution systems, and the operating mechanism of high-voltage vacuum circuit breakers plays a key role, so the assembly of the mechanism is a key factor. The existing assembly of the crank arm bearing has the following defects: 1. The crank arm bearing is assembled by manpower with the help of a hammer or copper rod in the early stage, which cannot ensure the balance of the applied force and may damage the inner and outer rings of the bearing and the retaining frame and other structural parts, resulting in the risk of abnormal operation of the entire mechanism. 2. It takes a lot of manpower and time, and it cannot be guaranteed that every driven-in bearing is intact. Therefore, it is necessary to propose improvements. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a pneumatic assembly tool for holding a crank arm bearing. The utility model aims to solve the defects of holding the crank arm bearing assembly and is a set of pneumatic tooling specially equipped for bearing assemblers, which greatly solves the time-consuming and labor-intensive problem of holding the crank arm bearing assembly.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The pneumatic assembly tooling for holding the crank arm bearing includes a frame, which is a door-type structure. A cylinder is fixedly provided on the upper part of the frame, and the central axis of the cylinder is vertical. A pressure head is fixedly connected to the piston rod at the lower part of the cylinder, and the pressure head is coaxial with the central axis of the cylinder. A fixed tooling plate is provided inside the frame, and a positioning structure for positioning the holding crank arm is provided on the upper part of the fixed tooling plate to ensure that the bearing mounting hole on the holding crank arm is coaxial with the pressure head after the holding crank arm is positioned.

[0006] As a further limitation of the above scheme, the frame is a door-shaped structure composed of vertical plates on both sides and a horizontal plate on the top, and the lower parts of the vertical plates on both sides are connected by a bottom plate.

[0007] As a further limitation of the above solution, the central axis of the cylinder is vertically arranged, and the cylinder is fixedly connected to the cross plate by fixing bolts.

[0008] To further define the above scheme, the pressure head is a cylindrical structure, and a threaded connection hole is provided on the upper end surface of the pressure head. The pressure head is screwed together with the external thread at the front end of the piston rod of the cylinder through the threaded connection hole; a center hole is provided on the lower end surface of the pressure head, and the lower part of the pressure head forms a circular ring structure that matches the bearing.

[0009] To further define the above scheme, the positioning structure of the retaining crank arm includes a center positioning column and a positioning pin, the center positioning column is fixed on the fixed tooling plate, the center positioning column is coaxial with the pressure head up and down and is used to position the bearing mounting hole on the retaining crank arm, and the center positioning column can be adapted to fit into the center hole on the pressure head; two positioning pins are provided, and the positioning pins are fixed on the fixed tooling plate according to the positions of the two holes on the retaining crank arm and ensure that the bearing mounting hole on the retaining crank arm is coaxial with the center positioning column and the pressure head.

[0010] As a further limitation of the above solution, side connection holes are provided on the vertical plates on both sides of the frame, and the fixed tooling plates are connected to the side connection holes by screws.

[0011] The advantages of this utility model compared with the prior art:

[0012] 1. This solution fixes the fixed tooling plate through the holes on both sides of the frame, and then positions the holding crank arm through the two positioning pins on the fixed tooling plate to make the holding crank arm position unique, then turn on the pneumatic operating switch, move the piston rod of the cylinder upward, put the bearing and the spacer into the corresponding hole position on the holding crank arm, press the pneumatic operating switch to close, move the piston rod of the cylinder downward, press the bearing into the bearing mounting hole of the holding crank arm, operate the switch again, move the piston rod of the cylinder upward, take out the assembled holding crank arm, and complete the installation. This tooling can help the circuit breaker mechanism assemblers to quickly assemble the bearings of the holding crank arm on the mechanism, which can save a lot of time for the mechanism assemblers and improve work efficiency;

[0013] 2. The pneumatic tooling of this scheme can greatly improve the assembly efficiency of the crank arm bearing, and when the pressure head is pressed into the bearing, it can greatly keep the pressed bearing from being damaged. The surface of the pressure head is parallel to the contact surface of the bearing, and the force is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a pneumatic assembly tool for holding a crank arm bearing provided by the utility model;

[0015] Figure 2 This is a structural front view of a fixed tooling plate in the utility model;

[0016] Figure 3 This is a top view of the structure in which the crank arm is mounted on the fixed tooling plate in the utility model. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0019] See also Figure 1-3 , describe the embodiments of the present utility model in detail.

[0020] Example: Pneumatic assembly tool for holding crank arm bearing, see Figure 1 As shown, it includes a frame 1, which is a door-type structure. A cylinder 2 is fixedly provided on the upper part of the frame 1, and the central axis of the cylinder 2 is vertical. A pressure head 4 is fixedly connected to the piston rod at the lower part of the cylinder 2, and the pressure head 4 is coaxial with the central axis of the cylinder 2. A fixed tooling plate 5 is provided inside the frame 1, and a positioning structure for positioning the crank arm 8 is provided on the upper part of the fixed tooling plate 5 to ensure that the bearing mounting hole on the crank arm 8 is coaxial with the pressure head 4 up and down after the crank arm 8 is positioned.

[0021] When this embodiment is used, the fixing tool plate 5 is fixed on the frame 1, and then the holding crank arm is positioned through the positioning structure on the fixing tool plate 5, so that the holding crank arm 8 has a unique position, and then the pneumatic operation switch is turned on, the piston rod of the cylinder 2 moves up, the bearing and the spacer are placed in the corresponding hole position on the holding crank arm, the pneumatic operation switch is pressed to close, the piston rod of the cylinder 2 moves down, the bearing is pressed into the bearing installation hole of the holding crank arm, and then the switch is operated, the piston rod of the cylinder 2 moves up, and the assembled holding crank arm is taken out to complete the installation. The tool can help the circuit breaker mechanism assemblers to quickly assemble the bearings of the holding crank arm on the mechanism, which can save a lot of time for the mechanism assemblers and improve work efficiency.

[0022] In a specific embodiment, the frame 1 is a door-shaped structure composed of vertical plates 1-1 on both sides and a horizontal plate 1-2 on the upper part, and the lower parts of the vertical plates 1-1 on both sides are connected through a bottom plate 1-3.

[0023] Through the above-mentioned implementation structure, the frame is made into a door-shaped structure, which is convenient for the installation of components such as the cylinder and the fixed tooling plate, so that the installation positions of the tooling components are reasonable and the operation is more convenient.

[0024] In a specific embodiment, the central axis of the cylinder 2 is vertically arranged, and the cylinder 2 is fixedly connected to the transverse plate 1 - 2 via fixing bolts 3 .

[0025] Through the above-mentioned implementation structure, it can be ensured that the positioning structures of the cylinder and the lower fixed tooling plate are arranged in upper and lower positions, so as to facilitate ensuring that the bearing is vertically pressed into the bearing mounting hole of the retaining crank arm during installation.

[0026] In a specific embodiment, see Figure 1 As shown, the pressure head 4 is a cylindrical structure, and a threaded connection hole 4-1 is provided on the upper end surface of the pressure head 4. The pressure head 4 is screwed together with the external thread of the front end of the piston rod of the cylinder 2 through the threaded connection hole 4-1; a center hole 4-2 is provided on the lower end surface of the pressure head 4, and the lower part of the pressure head 4 forms a circular ring structure that is compatible with the bearing.

[0027] Through the above structure, the structure of the pressure head can greatly keep the pressed bearing from being damaged when pressing into the bearing, and the surface of the pressure head is parallel to the contact surface of the bearing, so the force is more uniform.

[0028] In a specific embodiment, see Figure 2 , Figure 3 As shown, the positioning structure of the retaining crank arm 8 includes a center positioning column 6 and a positioning pin 7, the center positioning column 6 is fixed on the fixed tooling plate 5, the center positioning column 6 is coaxial with the pressure head 4 in upper and lower directions and is used to position the bearing mounting hole on the retaining crank arm 8, the center positioning column 6 can be adapted to fit into the center hole 4-2 on the pressure head 4; two positioning pins 7 are provided, the positioning pins 7 are fixed on the fixed tooling plate 5 according to the positions of the two holes on the retaining crank arm 8 and ensure that the bearing mounting hole on the retaining crank arm 8 is coaxial with the center positioning column 6 and the pressure head 4.

[0029] Through the above structure, the structure and installation position of the center positioning column and the positioning pin on the fixed tooling plate are designed according to the structure of the retaining crank arm, ensuring that the position of the retaining crank arm on the tooling is unique and unchanged during installation, facilitating positioning and improving work efficiency.

[0030] In a specific embodiment, the vertical plates 1-1 on both sides of the frame 1 are provided with side connection holes, and the fixed tooling plate 5 is connected to the side connection holes by screws. This structure improves the firmness and reliability of the connection of the fixed tooling plate.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pneumatic assembly tool for holding a crank arm bearing, characterized in that: The invention comprises a frame (1), wherein the frame (1) is a door-shaped structure, a cylinder (2) is fixedly arranged on the upper part of the frame (1), the central axis of the cylinder (2) is vertical, a pressure head (4) is fixedly connected to the piston rod at the lower part of the cylinder (2), the pressure head (4) is coaxial with the central axis of the cylinder (2), a fixed tooling plate (5) is arranged inside the frame (1), and a positioning structure for positioning a crank arm (8) is arranged on the upper part of the fixed tooling plate (5) to ensure that the bearing mounting hole on the crank arm (8) is coaxial with the pressure head (4) after the crank arm (8) is positioned.

2. The pneumatic assembly tool for holding the crank arm bearing according to claim 1 is characterized in that: The frame (1) is a door-shaped structure formed by connecting vertical plates (1-1) on both sides and a horizontal plate (1-2) on the top, and the lower parts of the vertical plates (1-1) on both sides are connected through a bottom plate (1-3).

3. The pneumatic assembly tool for holding the crank arm bearing according to claim 2 is characterized in that: The central axis of the cylinder (2) is vertically arranged, and the cylinder (2) is fixedly connected to the transverse plate (1-2) via fixing bolts (3).

4. The pneumatic assembly tool for holding the crank arm bearing according to claim 1 is characterized in that: The pressure head (4) is a cylindrical structure. The upper end surface of the pressure head (4) is provided with a threaded connection hole (4-1). The pressure head (4) is screwed with the external thread at the front end of the piston rod of the cylinder (2) through the threaded connection hole (4-1). The lower end surface of the pressure head (4) is provided with a center hole (4-2) so that the lower part of the pressure head (4) forms a circular ring structure that matches the bearing.

5. The pneumatic assembly tool for holding the crank arm bearing according to claim 4 is characterized in that: The positioning structure of the retaining crank arm (8) comprises a central positioning column (6) and a positioning pin (7); the central positioning column (6) is fixed on the fixed tooling plate (5); the central positioning column (6) is coaxial with the pressure head (4) in upper and lower directions and is used to position the bearing mounting hole on the retaining crank arm (8); the central positioning column (6) can be adapted to fit into the central hole (4-2) on the pressure head (4); two positioning pins (7) are provided, and the positioning pins (7) are fixed on the fixed tooling plate (5) according to the positions of the two holes on the retaining crank arm (8) and ensure that the bearing mounting hole on the retaining crank arm (8) is coaxial with the central positioning column (6) and the pressure head (4).

6. The pneumatic assembly tool for holding the crank arm bearing according to claim 2, characterized in that: Side connection holes are provided on the vertical plates (1-1) on both sides of the frame (1), and the fixed tooling plates (5) are connected to the side connection holes by means of screws.

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