CN106737328A - Nested type spanner clamping device - Google Patents

Abstract

The invention discloses a nested wrench clamping mechanism. The mechanism used to clamp the bolt when the wrench tightens the bolt is composed of a fixed sleeve, a sleeve, a central column, a return spring and a contact switch; the central column and sleeves of various specifications are nested inside the fixed sleeve, and the central column and each Return springs are installed below the standard sleeves. When clamping the bolt, put the clamping mechanism on the hexagonal head of the bolt, the hexagonal head will lift up the sleeve equal to or smaller than its size, and the rest of the sleeves will be clamped; when the center column or sleeve is pressed, the corresponding contact The switch is turned on and can be used to identify the bolt size. The advantage of the present invention is that the clamping mechanism is pressed down through sleeves of different specifications to adapt to bolts of different specifications, and the operation is convenient, stable and reliable, and the efficiency is high; the contact switch installed under the sleeve can be used to match the control system to detect the size of the bolt specification Then realize the automatic calculation of the required torque value, and improve the intelligence of the wrench.

Description

Nested Wrench Gripping Mechanism

technical field

The invention relates to a nested wrench clamping mechanism, which is especially suitable for emergency repair tasks and occasions requiring high precision of the pre-tightening force of connecting parts.

Background technique

Threaded connection is one of the most widely used connection methods, and has a large number of applications in civilian equipment and military equipment. All threaded connections need to be pre-tightened. Improper application of pre-tightened force may lead to equipment failure and serious accidents. At present, there are mainly two methods of applying proper preload: relying on experience and using a torque wrench. The method of relying on experience is widely used in occasions where the preload is not required to be high. This method has large errors and has certain potential safety hazards. Torque wrench is mainly used to control the proper pre-tightening force, but due to the lack of technical data, the setting value of torque wrench still depends on experience, which loses the meaning of using torque wrench. Improper pre-tightening force applied to the threaded connection will affect the efficiency of engineering maintenance and increase labor costs. Especially in the field of emergency repairs, the reduction in repair efficiency may lead to delays in fighter jets, loss of favorable battlefield conditions, and serious consequences.

There is often a set of sockets with a set of specifications in the existing toolboxes, the number of which varies from 10 to 20, and the corresponding sockets are selected according to the bolt specifications during use. This will cause a decrease in work efficiency, and is not conducive to the complete preservation of the entire set of tools. Once a sleeve of a certain specification is lost, it will bring great inconvenience to the maintenance work.

Contents of the invention

Aiming at the problems that the existing torque wrenches are not widely used, the degree of intelligence is not high, the use efficiency is low, and the number of sockets is large, the present invention forms a nested clamping mechanism by nesting sockets of various specifications. This mechanism can replace the whole set of sockets of various specifications in the tool box, reducing the number of tool heads.

The technical solution adopted by the nested wrench clamping mechanism of the present invention to solve its technical problems is: the mechanism is composed of several parts such as a fixed sleeve, a sleeve, a central column, a return spring and a contact switch. The nested wrench clamping mechanism is a combination of sockets of multiple specifications, and after the combination, the sockets of each specification can work independently. When tightening a bolt of a certain specification, the clamping mechanism is placed on the hexagonal head of the bolt like a sleeve, and the sleeve that is smaller than the hexagonal head of the bolt and the same specification as the hexagonal head will be jacked up, and the sleeve that matches the specification of the bolt will be placed on the bolt. Apply tightening torque on the head. The mechanism installs contact switches under the sockets of various specifications and the center column as sensors to identify the bolt specifications. With the corresponding control system, it can automatically identify the bolt specifications, calculate the corresponding required torque value, and improve the intelligence of the torque wrench. .

The size of the central column and the sleeves of each specification is determined according to the hexagonal head dimensions of the bolts of each specification within the scope of application of the clamping mechanism. According to the national standard data, the size of the hexagonal head of the C-level ordinary hexagonal bolt of the same specification is the same as that of the corresponding nut, so the clamping mechanism determined according to the size of the hexagonal head of the bolt is also applicable to the nut. The applicable object of the present invention is the first series of thread specifications within the range of C-level ordinary hexagon head bolts specified in the national standard GB/T 5780-2000 and the first series of thread specifications within the range of C-level ordinary hexagon nuts M5-M30 specified in GB/T 41-2000. The clamping mechanism provided is only suitable for disassembly and assembly of bolts of various specifications within the scope of applicable objects.

The feature of the invention is that the clamping mechanism quickly adapts to the size of the hexagonal head of the bolt, and the clamping is stable and reliable. It can be matched with a control system to realize automatic identification of bolt specifications and improve the intelligence of the wrench.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Figure 1 Schematic diagram of nested wrench clamping mechanism

Figure 2 Appearance of nested wrench clamping mechanism

Figure 3 Internal structure diagram of nested wrench clamping mechanism

Figure 4 Schematic diagram of sleeve structure

Among Fig. 1: 101. fixed cover, 102. sleeve, 103. central post, 104. return spring, 105. contact switch.

In Fig. 2: 201. Connector.

Among Fig. 4: 301. limit soil platform, 302. limit groove.

detailed description

Please refer to FIG. 1 , the nested wrench clamping mechanism is composed of a fixed sleeve 101 , a sleeve 102 , a central column 103 , a return spring 104 and a contact switch 105 .

Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, each sleeve 102 has a limiting boss 301 and a limiting groove 302, and the sleeves 102 of various specifications and the center column 103 are mutually limited and nested in the fixed sleeve. Among 101, the return spring 104 is installed under the sleeve 102 of each specification and the center column 103, and is used to lift the sleeve 102 and the center column 103, and the contact switch 105 is installed on the bottom end of the fixed sleeve 101. Below the central column 103. When the clamping bolt of the present invention is used, the clamping mechanism is directly placed on the hexagonal head of the bolt, and the sleeve 102 or central column 103 with the same size as the hexagonal head and the sleeve 102 or central column 103 with a smaller size than the hexagonal head will be Press down, and the remaining sleeve 102 and fixed sleeve 101 realize the clamping bolt hexagonal head. When the sleeve 102 or the central column 103 is pressed down, the corresponding contact switch 105 is turned on, and the contact switch 105 can be used as a sensor to match the control system to identify bolt specifications. After the operation of tightening the bolt is completed, the present invention is separated from the hexagon head of the bolt, the sleeve 102 and the central column 103 will be jacked up under the action of the return spring 104, and get back to the original position, and the corresponding contact switch 105 will also be disconnected.

Claims (2)

1. a kind of nested type spanner clamping device for assembling and disassembling bolt, it is characterized in that：By fixed cover, sleeve, newel, spring and Contact-making switch is constituted, and newel is installed among fixed cover with each specification sleeve, spring and contact-making switch be installed on newel and Sleeve lower section.

2. nested type spanner clamping device according to claim 1, it is characterized in that：Each specification sleeve is mutually nested and spacing, uses In each sized bolt turret head is clamped, back-moving spring is used for jack-up newel and sleeve, and contact-making switch is used to know as sensor Other bolt specification, bolt turret head will be equal to and be pressed less than the sleeve of its size, and remaining sleeve realizes clamping.