Tool applied to forward or reverse installation of shaft sleeve in narrow space

Abstract

The utility model relates to a tool applied to forward or reverse installation of a shaft sleeve in a narrow space, which comprises a support seat, a positioning pin seat, an installation screw rod and a pulling handle, the support seat is vertically provided with a left support arm and a right support arm to form an integral structure with a concave cross section, the left support arm is provided with a positioning round hole, the positioning round hole is in sliding fit with the positioning pin seat, and the right support arm is provided with a positioning screw rod. The positioning pin seat is in a stepped shaft shape, a first stepped shaft at one end of the positioning pin seat is in sliding fit with the positioning round hole, a second stepped shaft at the other end of the positioning pin seat is in sliding fit with a mounted shaft sleeve, a screw round hole is formed in a right supporting arm of the concave support seat, and the screw round hole is provided with internal threads and is in threaded connection with a mounting screw. A round hole is formed in the rear end of the mounting screw rod; and the wrench handle is inserted into the round hole. The device can be used under any condition, and forward and reverse shaft sleeve installation can be achieved whether parts of the installed shaft sleeve are in the vertical direction or the horizontal direction; and installation can be carried out when the operation space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance and installation tooling, and in particular to a tooling used for forward or reverse installation of a sleeve in a narrow space. Background Technology

[0002] When assembling the 2.5-inch wet alarm valve sleeve, the operating space is very limited and it needs to be installed in reverse, which undoubtedly increases the difficulty of assembly. Before studying this tooling, the assembly operator needs to reach into the valve body and use a small hammer to knock the sleeve into the shaft hole. This operation is very likely to cause the sleeve to be crooked and damaged because the internal state of the sleeve cannot be seen. In addition, the small space inside the valve body is difficult to operate, and it is also very difficult for the assembler to operate.

[0003] Most of the common shaft sleeve installation tools are shaft sleeve press-fitting tools. There are technical defects in the existing shaft sleeve installation tools: the shaft sleeve press-fitting tool has strict requirements on the installation position of the component when installing the shaft sleeve, and most of them are installed vertically; when the installation space is small, the shaft sleeve cannot be installed normally, and other components need to be disassembled for installation; at the same time, some shaft sleeve press-fitting tools have only one guide, which cannot be better positioned during installation, resulting in the shaft sleeve cannot be installed into the component in the positive direction, resulting in a decrease in the coaxial accuracy of the supporting bearing. The patent document with authorization announcement number CN 217371262 U discloses a sleeve crimping tool, including a bottom plate and a top plate, the top plate is connected to the upper part of the bottom plate by lifting, a base for fixing the sleeve is installed on the bottom plate, a pressing block is connected to the corresponding base under the top plate by lifting, a plurality of lifting columns are installed on the base, the top plate is connected to the lifting column by lifting, vertical lifting columns are screwed on the four corners of the bottom plate, clearance holes are provided at the tops of the four corners of the top plate corresponding to the lifting columns, the clearance holes are fixed to the corresponding top ends of the lifting columns, a vertical hydraulic cylinder for driving the pressing block to move up and down is installed on the top plate, a through hole is provided on the top plate corresponding to the telescopic end of the hydraulic cylinder, the telescopic end of the hydraulic cylinder is downward, extends through the top plate to form an extended end, and a pressing block is installed under the extended end. The patent document with the authorization announcement number CN 208215232 U discloses a valve stem sleeve tooling, which includes a base plate and a cylinder, a guide column is installed on the base plate, and the cylinder is installed on the cylinder seat at the upper end of the guide column. It is characterized in that the guide column is installed with a movable positioning plate connected to the cylinder rod of the cylinder, and a pressure head is installed on the movable positioning plate; a positioning seat for the valve sleeve is installed on the base plate below the pressure head, a positioning sleeve is installed on the positioning seat, and an adjusting screw for the valve sleeve is installed on the positioning sleeve.

[0004] The existing tooling for installing shaft sleeves cannot meet the requirements of installing shaft sleeves in narrow spaces. In mechanical maintenance operations, it is urgent to develop a tooling that can install shaft sleeves in the vertical or horizontal direction, even in a small space, in both forward and reverse directions. Summary of the Utility Model

[0005] The utility model is to overcome the deficiencies in the prior art and provide a tooling for installing a bushing in a narrow space in the forward or reverse direction, which can install the bushing in the forward or reverse direction in the vertical or horizontal direction at a position with a small space.

[0006] To achieve the above object, the utility model is realized through the following technical solutions. A tooling for installing a bushing in a narrow space in the forward or reverse direction includes a bracket seat, a positioning pin seat, an installation screw rod, and a wrench. The bracket seat is vertically provided with a left support arm and a right support arm to form an overall structure with a "concave" cross-sectional shape. A positioning round hole is provided on the left support arm of the concave-shaped bracket seat. The positioning round hole is slidably fitted with the positioning pin seat. The positioning pin seat is in the shape of a stepped shaft. One end of the first stepped shaft is slidably fitted with the positioning round hole, and the other end of the second stepped shaft is slidably fitted with the bushing to be installed. A screw rod round hole is provided on the right support arm of the concave-shaped bracket seat. The screw rod round hole is provided with internal threads and is screwed with the installation screw rod. The front end of the installation screw rod is provided with an installation round table, and the rear end of the installation screw rod is provided with a round hole. The wrench is inserted into the round hole.

[0007] Further, the length of the bracket seat is 50 - 60 mm, the width is 18 - 20 mm, the thickness of the left support arm and the right support arm is 8 - 10 mm, the height is 35 - 40 mm, and the inner distance between the left support arm and the right support arm is 35 - 40 mm.

[0008] Further, the bracket seat is made of A3 material.

[0009] Further, the inner angles of the left support arm and the right support arm and the bracket seat are provided with strengthening chamfers.

[0010] Further, the positioning round hole on the left support arm and the screw rod round hole on the right support arm are on the same axis to ensure coaxiality.

[0011] Beneficial effects: Compared with the prior art, the present utility model can be used under any conditions. Whether the parts of the bushing to be installed are in the vertical direction or the horizontal direction, the installation of the forward and reverse bushings can be realized; the installation can also be carried out when the operating space is small; the present utility model installs the bushing in the reverse direction, and there are guiding structures at both ends, greatly improving the success rate of installing the bushing; when installing, by operating the lever on the thread feeding mechanism, the bushing is extruded to achieve the effect of installing the bushing; when installing the bushing, the lever can be operated through the lever principle, saving time and effort. The present utility model can use this structure to enlarge the size and apply it to the installation of bushings in other positions with a small operating space. Brief Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of the present utility model;

[0013] Figure 2 a is the front view of the support base;

[0014] Figure 2 b is Figure 2 the right view of a;

[0015] Figure 2 c is Figure 2 the left view of a;

[0016] Figure 3 is the structural schematic diagram of the positioning pin base;

[0017] Figure 4 is the structural schematic diagram of the installation screw;

[0018] Figure 5 is the structural schematic diagram of the bushing to be installed in the embodiment.

[0019] In the figure: 1. Support base, 1-1. Left support arm, 1-1-1. Positioning round hole, 1-2. Right support arm, 1-2-1 Screw round hole, 2. Positioning pin base, 2-1. First stepped shaft, 2-2. Second stepped shaft, 3. Installation screw, 3-1. Installation round platform, 3-2. Round hole, 4. Handle, 5. Bushing to be installed, 6. Reinforcing chamfer. Specific embodiments

[0020] The following describes in detail the specific embodiments provided according to the present invention in combination with preferred embodiments: Referring to the accompanying drawings, this embodiment provides a tooling for installing a bushing forward or backward in a narrow space, including a support base 1, a positioning pin base 2, an installation screw 3 and a handle 4. The support base is vertically provided with a left support arm 1-1 and a right support arm 1-2 to form an overall structure with a "concave" cross-sectional shape. A positioning round hole 1-1-1 is provided on the left support arm of the concave support base. The positioning round hole is slidably fitted with the positioning pin base. The positioning pin base is in the shape of a stepped shaft. One end, the first stepped shaft 2-1, is slidably fitted with the positioning round hole, and the other end, the second stepped shaft 2-2, is slidably fitted with the bushing 5 to be installed. A screw round hole 1-2-1 is provided on the right support arm of the concave support base. The screw round hole is provided with internal threads and is screwed with the installation screw. The front end of the installation screw is provided with an installation round platform 3-1, and the rear end of the installation screw is provided with a round hole 3-2. The handle is inserted into the round hole.

[0021] In the preferred solution of this embodiment, the length of the support base is 50-60 mm, the width is 18-20 mm, the thickness of the left support arm and the right support arm is 8-10 mm, the height is 35-40 mm, and the inner distance between the left support arm and the right support arm is 35-40 mm.

[0022] In this embodiment, the length of the bracket base is 55 mm, the width is 18 mm, the thickness of the left support arm and the right support arm is 8 mm, the height is 35 mm, and the inner distance between the left support arm and the right support arm is 39 mm. The diameter of the positioning round hole in this embodiment is Φ10.2 +0.05 , the diameter of the first stepped shaft is Φ10.2 -0.05 , the length is 8 mm, and the diameter of the second stepped shaft is Φ6.00 -0.05 , the length is 7 mm, and the internal thread of the screw round hole matches the installation screw, and M14 triangular thread is adopted.

[0023] In a preferred solution of this embodiment, the bracket base is made of A3 material.

[0024] In a preferred solution of this embodiment, the left support arm and the right support arm are provided with a strengthening chamfer 6 at the inner corner of the bracket base to increase the strength.

[0025] In a preferred solution of this embodiment, the positioning round hole of the left support arm and the screw round hole of the right support arm are on the same axis to ensure coaxiality and play a guiding role.

[0026] Working process: Taking the installation of the bushing of a 2.5-inch wet alarm valve as an example in this embodiment, see the appendix for details Figure 5 , the dimensions of the bushing are: the outer diameter of the large circle is Φ12.65 - 12.90, the thickness of the large circle is 1.46 - 1.71 mm, the diameter of the small circle is Φ9.58 - 9.60, and the overall thickness is 9.53 mm.

[0027] 1. Assemble the overall tooling. After the positioning round hole on the left support arm is installed with the positioning pin seat, it needs to be spot-welded for reinforcement;

[0028] 2. During installation, place the bushing to be installed on the second stepped shaft of the positioning pin seat, and utilize the concave structure of the bracket base. The bushing to be installed can be placed below the round hole on the wall of the valve body where the bushing needs to be installed. At this time, rotate the installation screw, and the installation round table at the front end of the installation screw penetrates into the round hole of the valve body where the bushing needs to be installed, playing a positioning and guiding role to prevent damage to the bushing caused by incorrect assembly;

[0029] 3. Continue to rotate the wrench to rotate the installation screw. Since the length of the installation round table at the front end of the installation screw is only 3 mm, after the installation screw is tightened by 3 mm, further tightening will cause the bracket base to move in the reverse direction, and at the same time drive the bushing to be extruded, thereby achieving the effect of installing the bushing in the reverse direction.

[0030] The above detailed description of a tooling for forward or reverse installation of a bushing in a narrow space with reference to the embodiments is illustrative rather than restrictive. Several embodiments can be listed according to the defined scope. Therefore, changes and modifications without departing from the overall concept of the present invention should fall within the protection scope of the present invention.

Claims

1. A tool for installing a sleeve in a narrow space in a forward or reverse direction, characterized by: It includes a bracket seat, a positioning pin seat, a mounting screw and a lever, the bracket seat is vertically provided with a left support arm and a right support arm to form an overall structure with a "concave" cross-sectional shape, the left support arm of the concave bracket seat is provided with a positioning circular hole, the positioning circular hole is slidably matched with a positioning pin seat, the positioning pin seat is in the shape of a stepped shaft, a first stepped shaft at one end thereof is slidably matched with the positioning circular hole, and a second stepped shaft at the other end is slidably matched with the installed sleeve, a screw circular hole is provided on the right support arm of the concave bracket seat, the screw circular hole is provided with an internal thread and is screwed with the mounting screw, a mounting round table is provided at the front end of the mounting screw, a circular hole is provided at the rear end of the mounting screw, and the lever is plugged into the circular hole.

2. The tooling for forward or reverse installation of a sleeve in a narrow space according to claim 1 is characterized in that: The bracket seat has a length of 50-60 mm and a width of 18-20 mm. The thickness of the left support arm and the right support arm is 8-10 mm and the height is 35-40 mm. The inner distance between the left support arm and the right support arm is 35-40 mm.

3. The tooling for installing a sleeve in a narrow space in a forward or reverse direction according to claim 1 or 2 is characterized in that: The bracket seat is made of A3 material.

4. The tooling for installing a sleeve in a narrow space in a forward or reverse direction according to claim 1 is characterized in that: The left support arm, the right support arm and the inner corners of the bracket seat are provided with reinforced chamfers.

5. The tooling for installing a sleeve in a narrow space in a forward or reverse direction according to claim 1 is characterized in that: The positioning circular hole of the left supporting arm and the screw circular hole of the right supporting arm are on the same axis to ensure coaxiality.

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