Three-jaw clamping type assembling device for electric connector in narrow space of fire control system

Abstract

The utility model relates to a three-jaw clamping type assembling device for an electric connector in a narrow space of a fire control system, and belongs to the technical field of assembling device design. According to the device, three bosses which are located at the end of the device and form 120 degrees with one another are embedded into three bayonets of an annular nut to complete locking operation, the width and the length of the three jaws are precisely designed and tested and verified, meanwhile, material selection and surface treatment are conducted according to the application scene of the device, and the rigidity and the corrosion resistance of the device are further improved. According to the device, one operator can accurately clamp and efficiently fasten the electric connector of the fire control system under the conditions that the assembling operation space is limited and the light inside a cabinet is insufficient. The device can be used for replacing a traditional assembly mode that sharp-nose pliers are used for installation, the installation effects of accurate clamping and firm locking are achieved, and the assembly efficiency and the assembly quality are improved.

Description

Technical Field

[0001] This utility model belongs to the field of assembly device design technology, specifically relating to a three-jaw clamping assembly device for electrical connectors in narrow spaces of fire control systems. Background Technology

[0002] Currently, there are no matching screwdrivers available on the market for installing electrical connectors in fire control systems. The existing assembly method involves using needle-nose pliers to assemble round electrical connectors. This method has three drawbacks: first, it requires two people to work together; second, it has poor tool accessibility, is difficult to operate, and is inefficient; and third, it easily scratches the paint surface of the cabinet, causing quality defects. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] The technical problem to be solved by this utility model is: to design an assembly device for electrical connectors in narrow spaces of fire control systems, so as to improve both the assembly efficiency and the assembly quality of electrical connectors.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, this utility model provides a three-jaw clamping assembly device for electrical connectors in narrow spaces of fire control systems. The device includes three jaws 1 and a cavity 2, and the device is integrally machined. The three jaws 1 are three protrusions extending from one end face of the cavity 2 and are evenly distributed on the cavity 2 at circumferential intervals of 120°. The outer wall of the cavity 2 is provided with a weight-reducing groove 3, and the other end of the cavity 2 is a hand-held end 4.

[0007] Preferably, the surface of the handheld end 4 is knurled.

[0008] Preferably, the surface of the three claws 1 has been nitrided.

[0009] Preferably, the width of the three claws 1 is smaller than the width of the ring nut jaws that match the electrical connector, and the height is smaller than the depth of the ring nut jaws.

[0010] Preferably, the width of the three claws 1 is 0.2 mm less than the width of the ring nut jaws of the electrical connector, and the height is 0.1 mm less than the depth of the ring nut jaws.

[0011] Preferably, the wall thickness of the cavity 2 is 2 mm.

[0012] Preferably, the outer wall of the cavity 2 is provided with 3 sets of weight-reducing grooves 3.

[0013] Preferably, the materials of the three claws 1 and the cavity 2 are both 06Cr19Ni10 stainless steel.

[0014] Preferably, the electrical connector is a circular electrical connector.

[0015] Preferably, the device is used in a fire control system.

[0016] (III) Beneficial Effects

[0017] This invention provides a three-jaw clamping assembly device for electrical connectors in confined spaces within fire control systems. The device utilizes three mutually 120° protrusions at its end, which engage with three slots in a ring nut to achieve locking. The width and length of the three jaws have been precisely designed and experimentally verified. Furthermore, material selection and surface treatment tailored to the application scenario enhance the device's rigidity and corrosion resistance. This device allows for precise clamping and efficient fastening of fire control system electrical connectors by a single operator in environments with limited space and poor lighting within the cabinet. It replaces the traditional assembly method using needle-nose pliers, achieving both precise clamping and secure locking, while simultaneously improving assembly efficiency and quality. Attached Figure Description

[0018] Figure 1a This is a front view of the device of this utility model. Figure 1b This is a side view of the device of this utility model;

[0019] Figure 2 This is a schematic diagram illustrating the operating principle of the device of this utility model;

[0020] Figure 3 This is a partially enlarged view showing the operating principle of the device of this utility model. Detailed Implementation

[0021] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0022] When installing electrical connectors for a box-type rocket launcher fire control system in the confined space of a cabinet, difficulties arise such as incompatible tools and poor accessibility. Furthermore, issues like incomplete tightening leading to detachment and tool scratches on the cabinet's paint are common. This utility model relates to an installation device for assembling electrical connectors for a box-type rocket launcher fire control system in confined spaces. Its background stems from the electrical connector assembly process and represents a technical improvement on existing assembly methods used by operators. The tightening of fire control system electrical connectors relies on locking ring nuts. Since the ring nut has three 120° angled locking points, in the past, operators had to use needle-nose pliers to clamp two of these points for tightening. However, unsuitable tools and mismatched locking points caused operational difficulties, easy nut detachment, and tool scratches on the cabinet's paint. Moreover, due to limited operating space within the cabinet, assembly typically requires two people (one outside to fix the connector, and one inside to tighten it), which is labor-intensive, inefficient, and time-consuming. In response to the above situation, this utility model designs a three-jaw clamping assembly device for electrical connectors in narrow spaces.

[0023] Through repeated practice, the inventors of this utility model designed a three-jaw clamping assembly device for electrical connectors in confined spaces. The device relies on three mutually spaced 120° protrusions at the end of the device to engage with three slots in a ring nut to achieve locking. The width and length of the three jaws were precisely designed and experimentally verified. Furthermore, material selection and surface treatment were tailored to the application scenario, further enhancing the device's rigidity and corrosion resistance. This device allows one operator to accurately clamp and efficiently secure electrical connectors for fire control systems even in confined assembly spaces and poorly lit cabinet environments.

[0024] This utility model designs a three-jaw clamping assembly device with an integrated design, consisting of three jaws 1, a cavity 2, and other parts, all integrally machined. The three jaws 1 (three protrusions extending from the cavity) are evenly distributed at 120° intervals on one end face of the cavity 2. Weight-reducing grooves 3 are formed on the outer wall of the cavity 2. The other end of the cavity 2 is a handheld end 4, the surface of which is knurled. The surface of the three jaws 1 is nitrided. The width of the three jaws 1 is the width of the ring-shaped nut jaw of the electrical connector minus 0.2 mm; the height of the three jaws 1 is the depth of the ring-shaped nut jaw minus 0.1 mm. The wall thickness of the cavity 2 is 2 mm, and it has three sets of weight-reducing grooves 3. The materials for the three jaws 1 and the cavity 2 are 06Cr19Ni10 stainless steel.

[0025] The structural design of the above device is described in detail as follows: Since the locking part of the annular nut supporting the electrical connector has three 120°-mutual bayonets, the force application points are considered to cooperate and align with the bayonets of the annular nut during the design of this device. The protruding three-jaw 1 (also 120°-mutual) is used as the locking force application point, which cooperates with the bayonets of the annular nut of the electrical connector to achieve precise clamping. During the locking process, the three force application surfaces contact simultaneously, evenly distributing the load stress, effectively reducing the pressure per unit area, avoiding fatigue failure, and increasing the service life of the device. At the same time, the device adopts a structural form with a hollow inner cavity of the cavity 2 and weight-reducing grooves 3 provided on the outer wall to reduce weight under the condition of ensuring the rigidity of the device and reducing the burden on the operator's hand. To prevent slipping during fastening, the surface of the handheld end 4 is knurled to increase the friction between the hand and the device.

[0026] The dimension design of the above device is described in detail as follows: Due to the narrow assembly space, the length dimension of the device is controlled within 100 mm on the premise of satisfying the operator's handheld operation; to meet the requirements of being able to quickly find the bayonet for blind operation and maximizing the rigidity of the three-jaw 1, during the design, the width of the three-jaw 1 is set to be 0.2 mm less than the width of the bayonet of the annular nut supporting the electrical connector; to avoid scratching the cabinet paint layer during locking, the height of the three-jaw ́1 is set to be 0.1 mm less than the depth of the annular nut bayonet, ensuring that when the annular nut is locked to the bottom, the three-jaw 1 will not directly contact the cabinet paint surface; to reasonably reduce weight under the condition of ensuring the rigidity of the device, the inner cavity wall thickness of the cavity 2 is set to 2 mm, and 3 groups of weight-reducing grooves 3 are provided.

[0027] The material selection of the above device is described in detail as follows: Considering the actual application scenario of the device and the frequency of tool use, the material should meet the requirements of rust prevention, corrosion resistance, and high hardness. Therefore, the material 1 adopts 06Cr19Ni10 stainless steel.

[0028] The surface treatment of the three-jaw in the above device is described in detail as follows: Considering that the three-jaw is the core and vulnerable part of the whole device, the nitriding treatment is carried out on the three-jaw 1 part to improve the surface hardness, wear resistance, and fatigue strength of this part and reduce the notch sensitivity.

[0029] The operating principle of using the three-jaw clamping type assembly device in the chassis 5 to clamp and fasten the electrical connector of the fire control system is as Figure 2 、 Figure 3 shown. The operator holds the device 6 and sets it on the electrical connector 8. After contacting the annular nut 7, rotate it clockwise and apply a certain pressure, so that the three-jaw 1 part of the device 6 finds the bayonet position of the annular nut 7. When the three-jaw 1 part finds the bayonet of the annular nut of the electrical connector 8, continue to rotate clockwise to complete the locking.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A three-jaw clamping assembly device for electrical connectors in confined spaces of fire control systems, characterized in that, The device includes a three-claw (1) and a cavity (2), and the device is integrally machined. The three-claw (1) consists of three protrusions extending from one end face of the cavity (2) and are evenly distributed on the cavity (2) at circumferential intervals of 120°. The outer wall of the cavity (2) is provided with a weight-reducing groove (3), and the other end of the cavity (2) is a handheld end (4).

2. The apparatus as claimed in claim 1, characterized in that, The surface of the handheld end (4) has been knurled.

3. The apparatus as described in claim 1, characterized in that, The surface of the three claws (1) was nitrided.

4. The apparatus as claimed in claim 1, characterized in that, The width of the three claws (1) is smaller than the width of the ring nut jaws of the electrical connector, and the height is smaller than the depth of the ring nut jaws.

5. The apparatus as described in claim 4, characterized in that, The width of the three claws (1) is 0.2 mm less than the width of the ring nut jaws of the electrical connector, and the height is 0.1 mm less than the depth of the ring nut jaws.

6. The apparatus as claimed in claim 1, characterized in that, The wall thickness of the cavity (2) is 2 mm.

7. The apparatus as claimed in claim 1, characterized in that, The outer wall of the cavity (2) is provided with three sets of weight-reducing grooves (3).

8. The apparatus as claimed in claim 1, characterized in that, The materials of the three claws (1) and the cavity (2) are both 06Cr19Ni10 stainless steel.

9. The apparatus as claimed in claim 1, characterized in that, The electrical connector is a circular electrical connector.

10. The apparatus according to any one of claims 1 to 9, characterized in that, This device is used in fire control systems.

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