CN105291029A - Novel wrench - Google Patents

Abstract

The invention proposes a new type of wrench, comprising: a wrench main body, a movable door, and a key; wherein, the wrench main body is composed of a handle and a hexagonal bolt opening slot, and the hexagonal bolt opening slot can be connected with the hexagonal bolt opening. The four surfaces of the movable door are in contact with each other, one end of the movable door is installed on the handle through the connecting pin, the other end is provided with a bayonet, and the key is installed on the top of the handle; when the bayonet of the movable door is engaged with the key, the movable door and the wrench body The six-sided angular bolt opening draw-in groove forms the six-sided angular bolt closed-end draw-in groove.

Description

A new type of wrench

technical field

The invention relates to the field of mechanical installation, in particular to a novel wrench, which can realize the adjustment and use of an open-end wrench and a closed-end wrench.

Background technique

Recently, as pumped storage power stations are overhauled more and more frequently, the role of special overhaul tools in overhaul operations will become more and more important.

At present, the wrench is the most used tool for disassembling or tightening ordinary bolts. For bolts with special parts and uses, using ordinary wrenches (open-end wrenches, ring wrenches, etc.) for operations cannot achieve the desired results, and even damage parts.

For example, take the generator thrust bearing pad of a pumped storage power station that needs to be pulled out for maintenance as an example. As shown in Fig. 6, the generator thrust bearing pad 300 is mainly used to bear the weight of the generator rotor 400, and the weight of the generator rotor is generally 400 tons to 600 tons (large and medium-sized units). In FIG. 6 , the blocking post is fixed on the base 200 , and the front blocking post of the thrust bearing pad is the right blocking post 100 shown in the perspective of FIG. 6 . The function of the retaining column is to prevent the thrust bearing pad 300 from swinging back and forth. Therefore, when the generator set is in normal operation, the two retaining columns are often subjected to one-sided collision of the thrust bearing pad 300. The one-sided collision may easily cause the lower thread of the retaining column to bite or not be strong. , which makes it difficult to remove the retaining column.

Since the thrust bearing pad 300 cannot move up and down, when it is necessary to pull out the thrust bearing pad for maintenance, the rotor weight 400 must be raised by several millimeters first, and then the retaining column 100 must be disassembled, so that the thrust bearing pad 300 can be moved to the right pull out. As shown in FIG. 6 , due to the particularity of the position of the blocking post 100 , there is no cut-in opening for a closed-end wrench (such as a ring wrench) up and down, so the blocking post cannot be disassembled with a closed-end wrench. Under normal circumstances, an open-end wrench can be used to clamp the hexagonal part in the middle of the retaining post 100, and then the retaining post 100 is pulled out. strength surface.

In actual operation, the retaining post cannot be disassembled with an ordinary open-end wrench, and the two corners of the retaining post will be damaged. There are two reasons for this. One is that screw glue is applied to the thread of the retaining post during installation. After solidification, the retaining post is very tight. When dismounting with an ordinary open-end wrench, only two corners can bear force, which is not enough to resist the occlusal force of the thread of the retaining post. Even damage the corners of the retaining column; second, the retaining column has been subjected to one-sided collision for a long time under the front and rear vibration of the thrust bearing pad, causing the thread of the retaining column to gnaw or not be strong. The two corners are not enough to disassemble the retaining column, or even damage the retaining column edges and corners.

Due to the special position of the retaining post, the retaining post cannot be disassembled with an ordinary open-end wrench. Excessive force will damage the six-sided corners of the retaining post, and the ordinary ring wrench has no incision. To sum up, under the condition of not damaging the parts, it is necessary to realize the dismantling work of the retaining column, and a new type of wrench is urgently needed.

Contents of the invention

In order to solve the problems encountered in the maintenance process such as difficult disassembly of parts, such as slipping or misalignment of bolts and parts in special parts, the present invention proposes a new type of wrench that can adjust the opening and closing, which can realize special The disassembly of the high-tightness bolts and parts of the parts without causing damage to the parts.

In order to achieve the above object, the present invention proposes a new type of wrench, including: wrench main body 1, movable door 2, and key 3; wherein, the wrench main body 1 is composed of a handle and a hexagonal bolt opening slot, and the hexagonal bolt The opening slot can be in contact with the four faces of the hexagonal bolts. One end of the dodge door 2 is installed on the handle through a connecting pin, the other end is provided with a bayonet, and the bayonet 3 is installed on the top of the handle; When engaged with the key 3, the dodge door 2 and the hexagonal bolt opening groove of the wrench body 1 form a hexagonal bolt closed groove.

Further, the key 3 is installed on the top of the handle through a connecting pin or a bolt.

Further, the new wrench also includes: a spring, one end of which is fixed on the top of the handle, and the other end bears against the bottom of the key 3 .

The new wrench proposed by the present invention is a special open and closed end wrench, which is a wrench invented for dismounting bolts at special positions. It combines the advantages of ordinary open end wrenches and ring wrenches, and can be Removing bolts or parts with high tightness in special parts can effectively solve the problem that the retaining column of the thrust bearing pad cannot be disassembled in the maintenance of the pumped storage power station unit.

Description of drawings

The drawings described here are used to provide further understanding of the present invention, constitute a part of the application, and do not limit the present invention. In the attached picture:

Fig. 1 is a structural schematic diagram of a novel wrench according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a wrench body according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a movable door according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of an enlarged structure of part A of the dotted box shown in FIG. 1 .

Fig. 5 is a schematic diagram of the process of engaging a hexagonal-angled bolt with a new wrench according to a specific embodiment of the present invention.

Fig. 6 is a schematic cross-sectional side view of the installation of the thrust bearing pad of the generator of the pumped storage power station according to a specific embodiment of the present invention.

detailed description

The technical means adopted by the present invention to achieve the intended invention purpose are further described below in conjunction with the drawings and preferred embodiments of the present invention.

As shown in FIG. 1 to FIG. 4 , the new wrench proposed by the present invention includes: a wrench body 1 , a movable door 2 , and a key 3 .

Wherein, the wrench main body 1 is composed of a handle 11 and a hexagonal bolt opening slot 12. As shown in FIG. 2, the hexagonal bolt opening slot 12 can contact with four surfaces of the hexagonal bolt.

As shown in FIG. 3 , one end of the movable door 2 is mounted on the handle 11 through a connecting pin 24 , and the other end is provided with a bayonet 21 . The part drawn by the dotted line in FIG. 3 is a partial cross-sectional schematic diagram of the dodge door. The connecting pin 24 passes through the through hole 13 on the handle 11 so that the dodge door 2 can rotate around the through hole 13 .

As shown in FIG. 4 , the key 3 is installed on the top of the handle 11 through a connecting pin or bolt 31 . The part drawn out by the dotted line in FIG. 4 is a schematic cross-sectional view of the key. The connecting pin or bolt 31 passes through the through hole 14 at the top of the handle 11 so that the key 3 can rotate around the through hole 14 .

The key 3 is used for the closed connection between the dodge door 2 and the wrench main body 1. Since the key 3 has high requirements for strength, in this embodiment, a spring 4 is also arranged between the key 3 and the handle 11. The spring 4 One end is fixed on the top of the handle 11, and the other end is against the bottom of the key 3. This makes it difficult for the dodge door 2 to disengage after being engaged, and the key 3 can also move downward under the action of artificial external force to make the dodge door 2 disengage.

As shown in Figure 1, when the bayonet 21 of the dodge door 2 is engaged with the snap key 3, the first contact surface 22 and the second contact surface 23 on the dodge door 2 can form a six-sided locking groove 12 with the hexagonal bolt opening. Closed card slot for face angled bolts.

In order to explain the above-mentioned new wrench more clearly, a specific embodiment will be described below. However, it should be noted that this embodiment is only for better illustrating the present invention, and does not constitute an improper limitation of the present invention.

FIG. 5 is a schematic diagram of a new wrench engaging a hexagonal-angled bolt according to a specific embodiment of the present invention. The hexagonal-angled bolt may be the retaining column 100 shown in FIG. 6 . As shown in Figure 5, the dodge door 2 of the new wrench is opened, the wrench main body 1 is snapped into the hexagonal corner part of the retaining column 100, and the dodge door 2 is closed and interlocked with the high-strength key 3, that is, the open-end wrench If it is converted into a closed-end wrench, the six corners of the retaining post 100 are all stressed, and the retaining post 100 can be easily disassembled without damaging any part of the retaining post.

The invention combines the advantages of the common open-end wrench and the ring wrench, and can disassemble the bolts or parts with special parts and high tightness without damaging the parts, and can effectively solve the thrust bearing encountered in the maintenance of the pumped storage power station unit The problem that the tile retaining column cannot be disassembled.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (3)

1. A novel wrench, characterized in that it comprises: a wrench main body (1), a movable door (2), and a key (3); wherein, The main body of the wrench (1) is composed of a handle and an opening slot for the hexagonal bolt. The opening slot for the hexagonal bolt can be in contact with the four faces of the hexagonal bolt. One end of the movable door (2) is installed on the handle through a connecting pin. , the other end is provided with a bayonet, and the bayonet (3) is installed on the top of the handle; When the bayonet of the dodge door (2) is engaged with the snap key (3), the dodge door (2) and the hexagonal bolt opening slot of the wrench main body (1) form the hexagonal bolt closed slot. 2. The novel wrench according to claim 1, characterized in that the key (3) is mounted on the top of the handle through a connecting pin or bolt. 3. The new wrench according to claim 1, characterized in that the new wrench further comprises: a spring, one end of the spring is fixed on the top of the handle, and the other end is against the bottom of the key (3).