A clamping positioning device for screwing nuts

Abstract

The application provides a clamping positioning device for screwing nuts, which comprises a bottom plate, a lower side plate, a positioning plate supported on the lower side plate, an upper side plate arranged on the positioning plate, a support plate fixed on the upper side plate, a fixing plate arranged on the positioning plate, a double-acting linear cylinder arranged on the bottom plate, a pressing plate arranged on the double-acting linear cylinder, a gasket arranged on the pressing plate, a sleeve matched with a torque wrench, and a manual three-position five-way reversing valve arranged on the bottom plate. The device can quickly clamp and position the product to be assembled, provides support for maintaining coaxiality of the binding post and the self-locking nut during the nut screwing assembly process, and takes avoidance protection measures for the ceramic insulating seat.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mechanical processing, and particularly relates to a clamping and positioning device for screwing nuts. BACKGROUND

[0002] Currently, a K-graduated exhaust temperature thermocouple commonly used in an aero-engine mainly adopts a screw type terminal post for signal output, and the terminal post is installed and fixed on a ceramic insulating seat of the exhaust temperature thermocouple through a self-locking nut, as shown in the figure. Figure 10 The terminal post of the K-graduated exhaust temperature thermocouple is usually processed by using a nickel-chromium-nickel silicon alloy material with the same graduation as the thermocouple, so as to extend the reference end of the thermocouple and avoid the influence of environmental temperature change on the potential signal transmission; the ceramic insulating seat mainly plays an insulating isolation role, so as to prevent the thermoelectric potential signal output by the thermocouple from being shunted when passing through the terminal post, thereby causing signal distortion; and the self-locking nut mainly plays a role of fixing the terminal post and preventing loosening, so as to meet the fastening requirement, and a large tightening torque needs to be applied during the screwing process, and a worker uses a torque wrench to assemble a sleeve to screw the self-locking nut during actual assembly.

[0003] Due to the uncertainty of manual operation when lacking of suitable tool cooperation, the self-locking nut is often jammed, the terminal post is broken, and the ceramic insulating seat is broken due to the improper force angle of the sleeve during actual assembly.

[0004] Therefore, a clamping and positioning device specially used for screwing nuts needs to be provided to meet the assembly requirement and reduce the additional damage caused by the assembly process. SUMMARY

[0005] In order to solve the above problems, a clamping and positioning device for screwing nuts is provided, which can quickly clamp and position the product to be assembled, provide support for maintaining the coaxiality of the terminal post and the self-locking nut during the screwing nut assembly process, and take avoidance protection measures for the ceramic insulating seat.

[0006] The purpose of the application is to provide a clamping and positioning device for screwing nuts, which comprises a bottom plate, a lower side plate arranged on the bottom plate, a positioning plate arranged on the lower side plate and used for positioning and installing a product to be assembled, an upper side plate arranged on the positioning plate, a support plate fixed on the upper side plate and used for supporting a sleeve during the screwing operation of the sleeve, a fixing plate arranged on the positioning plate and used for connecting the upper side plate and adjusting the front and back dimensions, a double-acting straight-line cylinder arranged on the bottom plate, a pressing plate arranged on the double-acting straight-line cylinder and used for pressing a flange plate of the product to be assembled, a gasket arranged on the pressing plate and used for pressing the flange plate of the product to be assembled, a sleeve matched with a torque wrench and used for screwing the self-locking nut of the product to be assembled, and a manual three-position five-way reversing valve arranged on the bottom plate and used for switching and controlling the air inlet and air exchange, thereby controlling the lifting of the pressing plate.

[0007] The nut screwing clamping positioning device also has the following characteristics: the positioning plate comprises a base plate, a positioning pin and a first open slot,

[0008] The base plate is a square base plate, and mounting holes and threaded holes are arranged on the base plate and used for connecting the lower side plate and the fixing plate respectively,

[0009] The positioning pin is a hexagonal column structure, and the left and right sides are circular arc edges, and the upper and lower sides are straight edges, forming a rhombus, and the circular arc edges are matched with the circular holes of the flange of the product to be assembled,

[0010] The open slot is used for facilitating the disassembly of the product to be assembled.

[0011] The nut screwing clamping positioning device also has the following characteristics: the pressing plate is a Y-shaped structure, the front end of the pressing plate is formed into a second open slot by two branches, and the branches of the pressing plate are connected with the gasket; the rear end mounting hole of the pressing plate is connected and fixed on the double-acting linear cylinder through a screw,

[0012] When the pressing plate moves downward, the pressing force is transmitted to the product to be assembled by the gasket.

[0013] The nut screwing clamping positioning device also has the following characteristics: the sleeve is divided into an upper end, an intermediate section and a lower end,

[0014] The upper end is provided with a square hole, and the hole wall surface is processed with an arc-shaped groove for assembling the torque wrench;

[0015] The intermediate section is a solid cylindrical section with a diameter of 7 mm, which is used in cooperation with the supporting plate to ensure the coaxiality when the sleeve knob is rotated;

[0016] The lower end is provided with a waist-shaped hole and a circular deep hole for cooperating with the self-locking nut to rotate the knob, and the circular deep hole is used for avoiding the terminal post.

[0017] The nut screwing clamping positioning device also has the following characteristics: the depth of the waist-shaped hole is less than the height of the self-locking nut.

[0018] The nut screwing clamping positioning device also has the following characteristics: the supporting plate comprises a supporting section and mounting ends arranged at both ends of the supporting section, and the mounting ends are provided with threaded holes connected and fixed with the upper side plate,

[0019] The supporting section is composed of a circular arc structure and a straight line structure, and the circular arc structure is divided into an upper circular arc and a lower circular arc, and the upper circular arc and the lower circular arc are respectively composed of a plurality of semicircular structures, and the centers of the semicircular structures are spaced apart and consistent with the spacing of the terminal posts of the product to be assembled.

[0020] The nut screwing clamping positioning device also has the features that the arc structure cooperates with the middle section of the sleeve,

[0021] When the middle section of the sleeve cooperates with the upper arc, the sleeve assembly torque wrench rotates clockwise from top to bottom; when the middle section of the sleeve cooperates with the lower arc, the sleeve assembly torque wrench rotates clockwise from bottom to top.

[0022] The nut screwing clamping positioning device also has the features that the semicircle structure is a semicircle structure with a diameter of 7.1 mm.

[0023] The nut screwing clamping positioning device also has the features that the positioning device further comprises an upper moving air inlet guide pipe and a lower moving air inlet guide pipe connected with the manual three-position five-way reversing valve and the double-acting linear cylinder,

[0024] The upper moving air inlet guide pipe and the lower moving air inlet guide pipe both comprise two pipes with diameters of 6 mm and 8 mm,

[0025] The 6 mm air inlet guide pipe and the 8 mm air inlet guide pipe are respectively connected with variable-diameter pneumatic quick connectors.

[0026] The nut screwing clamping positioning device also has the features that the double-acting linear cylinder is further provided with a first external thread pneumatic quick connector for connecting the 6 mm air inlet guide pipe,

[0027] The manual three-position five-way reversing valve is further connected with a second external thread pneumatic quick connector for connecting the 8 mm air inlet guide pipe, an air inlet pipe for air inlet delivery, a third external thread pneumatic quick connector for connecting the air inlet pipe, and a silencer.

[0028] Beneficial effects:

[0029] The nut screwing clamping positioning device is provided with a positioning plate and a pneumatic push plate mechanism, so that the product to be assembled can be quickly disassembled and accurately positioned, and the device will not be loosened randomly during use, causing the sleeve angle to deviate during nut screwing. The pneumatic mechanism formed by the combination of the double-acting linear cylinder, the manual three-position five-way reversing valve, the air inlet pipe, the air guide pipe, and the pneumatic quick connector has a simple structure and is convenient to operate. During use, the air inlet pipe is connected to the compressed air interface, and the push-pull control is realized through the manual three-position five-way reversing valve switch, so that the product can be pressed tightly. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following only are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0031] Figure 1 The isometric view of the clamping and positioning device for screwing nuts provided by the embodiments of the present application;

[0032] Figure 2 The reverse isometric view of the clamping and positioning device for screwing nuts provided by the embodiments of the present application;

[0033] Figure 3 The front view of the positioning plate in the embodiments of the present application;

[0034] Figure 4 The top view of the positioning plate in the embodiments of the present application;

[0035] Figure 5 The isometric view of the pressing plate in the embodiments of the present application;

[0036] Figure 6 The main sectional view of the sleeve in the embodiments of the present application;

[0037] Figure 7 The top view of the sleeve in the embodiments of the present application;

[0038] Figure 8 The bottom view of the sleeve in the embodiments of the present application;

[0039] Figure 9 The isometric view of the supporting plate in the embodiments of the present application;

[0040] Figure 10 The product structure schematic view to which the clamping and positioning device for screwing nuts provided by the present application is applied,

[0041] In the product structure schematic view, 1 is a fixed plate, 2 is a lower side plate, 3 is a gasket, 4 is a positioning plate, 4a is a base body, 4b is a positioning pin, 4c is a first open slot, 5 is a pressing plate, 5a is a pressing plate branch, 5b is a second open slot, 5c is a mounting hole, 6 is a sleeve, 6a is an upper end, 6b is a middle section, 6c is a lower end, 7 is a compound-action linear cylinder, 8 is an upper moving air inlet pipe, 9 is an upper side plate, 10 is a lower moving air inlet pipe, 11 is a variable-diameter pneumatic quick connector, 12 is a supporting plate, 12a is a mounting end, 12b is a supporting section, 13 is a hand-operated three-position five-way reversing valve, 14 is a first external thread pneumatic quick connector, 15 is a second external thread pneumatic quick connector, 16 is an air inlet pipe, 17 is a third external thread pneumatic quick connector, 18 is a silencer, and 19 is a bottom plate. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the following embodiments are combined with the drawings to specifically describe the screw nut clamping and positioning device provided by the present application.

[0043] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] In addition, the terms "first", "second", "third" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] The terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0046] As Figures 1-9As shown, a nut screwing clamping positioning device is provided, which comprises a bottom plate 19, a lower side plate 2 arranged on the bottom plate 19, a positioning plate 4 supported on the lower side plate 2 for positioning the installation of the product to be assembled, an upper side plate 9 arranged on the positioning plate 4, a support plate 12 fixed on the upper side plate 9 for supporting the sleeve 6 when the sleeve 6 is operated, a fixing plate 1 arranged on the positioning plate 4 for connecting the upper side plate 9 and adjusting the front and back size, a double-acting linear cylinder 7 arranged on the bottom plate 19, a pressing plate 5 arranged on the double-acting linear cylinder 7 for pressing the flange of the product to be assembled, a gasket 3 arranged on the pressing plate 5 for pressing the flange of the product to be assembled, a sleeve 6 matched with a torque wrench for screwing the self-locking nut of the product to be assembled, and a manual three-position five-way reversing valve 13 arranged on the bottom plate 19 for opening and closing the air inlet and air exchange to control the lifting of the pressing plate. Each connection mechanism has a preset threaded hole and a through hole, and M3, M4, M5, M6 and other standard screw components are used for mutual connection. The support plate 12 is used to support the sleeve 6 when the sleeve 6 is operated, so as to ensure that the sleeve 6 and the terminal post and the self-locking nut maintain coaxiality. The fixing plate 1, the lower side plate 2 and the gasket 3 are both two pieces.

[0047] In some embodiments, the positioning plate 4 comprises a base plate 4a, a positioning pin 4b and a first open slot 4c. The base plate 4a is a square base plate, and mounting holes and threaded holes are arranged on the base plate 4a for connecting the lower side plate 2 and the fixing plate 1 respectively. The positioning pin 4b is a hexagonal column structure, and the left and right sides are circular arc edges, and the upper and lower sides are straight edges to form a rhombus. The circular arc edges are matched with the circular holes of the flange of the product to be assembled, and the first open slot 4c is used for facilitating the disassembly of the product to be assembled. In the above embodiment, the matching of the circular arc edges with the circular holes of the flange of the product to be assembled ensures that the product installation position is certain to avoid eccentricity, the straight edges of the rhombus reduce the contact with the circular holes of the flange, avoid installation jamming, and improve the assembly and disassembly efficiency; the first open slot 4c facilitates the quick assembly of the product to be assembled, and also improves the assembly and disassembly efficiency.

[0048] In some embodiments, the pressing plate 5 is a Y-shaped structure, the front end of the pressing plate 5 is formed into a second open slot 5b by two branches, and the pressing plate branches 5a are connected with the gasket 3; the rear end mounting hole 5c of the pressing plate is connected and fixed on the double-acting linear cylinder 7 by a screw, and when the pressing plate 5 moves downward, the pressing force is transmitted to the product to be assembled by the gasket 3. In the above embodiment, the double-acting linear cylinder 7 is controlled by the manual three-position five-way reversing valve 13 to be pushed by compressed air to run, so that the pressing plate 5 moves up and down; when the pressing plate 5 moves downward, the pressing force is mainly transmitted to the product to be assembled by the gasket 3, and the limited contact surface ensures the pressing of the product while reducing the possible pressure injury to the product.

[0049] In some embodiments, the sleeve 6 is divided into an upper end 6a, a middle section 6b and a lower end 6c, the upper end 6a is provided with a square hole, and the hole wall is processed with an arc-shaped groove for assembling the torque wrench; the middle section 6b is a solid cylindrical section with a diameter of φ7mm, which is used to cooperate with the support plate to ensure the coaxiality when the sleeve knob is rotated; the lower end 6c is provided with a waist-shaped hole and a circular deep hole for cooperating with the self-locking nut to rotate the knob, and the circular deep hole is used to avoid the terminal post.

[0050] In some embodiments, the depth of the waist-shaped hole is less than the height of the self-locking nut. The depth of the waist-shaped hole is 3.1mm, which is less than the height of the self-locking nut, and when the self-locking nut is assembled, it will not contact the ceramic insulating seat.

[0051] In some embodiments, the support plate 12 includes a support section 12b and mounting ends 12a arranged at both ends of the support section 12b, the mounting ends 12a are provided with threaded holes connected and fixed with the upper side plate 9, the support section 12b is composed of a circular arc structure and a straight line structure, the circular arc structure is divided into an upper circular arc and a lower circular arc, the upper circular arc and the lower circular arc are respectively composed of a plurality of semicircular structures, the center distance of the semicircular structures is consistent with the interval of the terminal post of the product to be assembled. The center distance is 12mm.

[0052] In some embodiments, the circular arc structure cooperates with the middle section 6b of the sleeve 6, when the middle section 6b of the sleeve 6 cooperates with the upper circular arc, the torque wrench assembled with the sleeve 6 is rotated clockwise from top to bottom; when it cooperates with the lower circular arc, the torque wrench assembled with the sleeve 6 is rotated clockwise from bottom to top.

[0053] In some embodiments, the semicircular structure is a semicircular structure with a diameter of φ7.1mm.

[0054] In some embodiments, the positioning device further includes an upper moving air inlet guide pipe 8 and a lower moving air inlet guide pipe 10 connected with the manual three-position five-way directional valve 13 and the double-action linear cylinder 7, the upper moving air inlet guide pipe 8 and the lower moving air inlet guide pipe 10 both include 6mm and 8mm pipes, and the 6mm air inlet guide pipe and the 8mm air inlet guide pipe are respectively connected with variable-diameter pneumatic quick connectors. The upper moving air inlet guide pipe 8 is used for air inlet guidance when the pressing plate 5 moves up, and the lower moving air inlet guide pipe 10 is used for air inlet guidance when the pressing plate 5 moves down.

[0055] In some embodiments, the double-action linear cylinder 7 is further provided with a first external thread pneumatic quick connector 14 for connecting the 6mm air inlet guide pipe, and the manual three-position five-way directional valve 13 is further connected with a second external thread pneumatic quick connector 15 for connecting the 8mm air inlet guide pipe, an air inlet pipe 16 for air inlet delivery, a third external thread pneumatic quick connector 17 for connecting the air inlet pipe 16, and a silencer 18. The silencer 18 is used for air exchange silencing.

[0056] The working process of any one of the foregoing embodiments:

[0057] The screwing nut is fixed on the workbench by the clamping positioning device, the air inlet pipe 16 is connected with the compressed air interface, the product to be assembled is loaded into the clamping positioning device through the opening slot 4c on the positioning plate 4, and the two mounting holes on the flange of the product to be assembled are sleeved on the positioning pins 4b of the positioning plate 4; the push-pull switch of the manual three-position five-way reversing valve 13 is operated, the switch is pushed forward, compressed air enters the double-acting straight-line cylinder 7 through the second external thread pneumatic quick connector 15, the air guide pipe 10, the variable-diameter pneumatic quick connector 11 and the first external thread pneumatic quick connector 14, the cylinder pushes down the pressing plate 5, and the gasket 3 connected with the pressing plate 5 tightly fixes the product to be assembled placed on the positioning plate 4; the square hole at the upper end 6a of the sleeve 6 is connected with the torque wrench interface, the middle segment 6b of the sleeve 6 is placed in the upper arc groove of the supporting segment 12a of the supporting plate 12, the middle segment 6b of the sleeve 6 is tightly attached to the arc groove, the self-locking nut on the terminal post of the product to be assembled is sleeved in the waist-shaped hole at the lower end 6c of the sleeve 6 by adjusting the lower end 6c of the sleeve 6, the torque wrench is rotated clockwise from top to bottom, and the operation is repeated several times until the specified screwing torque is reached, and the self-locking nuts on the two terminal posts of the product to be assembled are sequentially installed through the upper arc groove of the supporting segment 12a of the supporting plate 12; the middle segment 6b of the sleeve 6 is placed in the lower arc groove of the supporting segment 12a of the supporting plate 12, the middle segment 6b of the sleeve 6 is tightly attached to the arc groove, the self-locking nut on the terminal post of the product to be assembled is sleeved in the waist-shaped hole at the lower end 6c of the sleeve 6 by adjusting the lower end 6c of the sleeve 6, the torque wrench is rotated clockwise from bottom to top, and the operation is repeated several times until the specified screwing torque is reached, and the self-locking nuts on the other two terminal posts of the product to be assembled are sequentially installed through the lower arc groove of the supporting segment 12a of the supporting plate 12; the push-pull switch of the manual three-position five-way reversing valve 13 is operated, the switch is pulled backward, compressed air enters the double-acting straight-line cylinder 7 through the external thread pneumatic quick connector 15, the air guide pipe 8, the variable-diameter pneumatic quick connector 11 and the first external thread pneumatic quick connector 14, the cylinder pushes up the pressing plate 5, the product to be assembled is taken off from the positioning plate 4, and the installation of the self-locking nuts on the terminal posts of the product to be assembled is completed

[0058] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A chucking positioning device for screwing nuts, characterized in that, The device includes a base plate, a lower side plate mounted on the base plate, a positioning plate supported on the lower side plate for positioning and mounting the product to be assembled, an upper side plate mounted on the positioning plate, a support plate fixed on the upper side plate for supporting the sleeve when the sleeve is turned, a fixing plate mounted on the positioning plate for connecting the upper side plate and adjusting its front and rear dimensions, a repeating linear cylinder mounted on the base plate, a pressure plate mounted on the repeating linear cylinder for pressing the flange of the product to be assembled, a gasket mounted on the pressure plate for pressing the flange of the product to be assembled, a sleeve used in conjunction with a torque wrench for turning the self-locking nut of the product to be assembled, and a manual three-position five-way directional valve mounted on the base plate for switching on / off operation of air intake and air exchange, thereby controlling the lifting and lowering of the pressure plate. The positioning device also includes an upward-moving air intake guide pipe and a downward-moving air intake guide pipe connected to a manual three-position five-way reversing valve and a repeating linear cylinder. Both the upward-moving and downward-moving air intake guide pipes include two types of pipes: 6mm and 8mm. The 6mm and 8mm intake guide pipes are each connected to a reducing pneumatic quick-connect fitting. The support plate includes a support section and mounting ends disposed at both ends of the support section. The mounting ends are provided with threaded holes for connection and fixation to the upper side plate. The support section consists of an arc structure and a straight structure. The arc structure is divided into an upper arc and a lower arc, and each of the upper and lower arcs is composed of multiple semicircular structures. The center interval of the semicircular structures is consistent with the spacing of the terminals of the product to be assembled. The arc structure mates with the middle section of the sleeve. When the middle section of the socket mates with the upper arc, the torque wrench of the socket assembly rotates clockwise from top to bottom; when it mates with the lower arc, the torque wrench of the socket assembly rotates clockwise from bottom to top.

2. The chucking and positioning device for nut running according to claim 1, characterized in that, The positioning plate includes a base plate, positioning pins, and a first opening groove. The substrate is a square substrate, and it has mounting holes and threaded holes, which are used to connect the lower side plate and the fixing plate, respectively. The locating pin is a hexagonal prism structure with rounded edges on the left and right sides and straight edges on the top and bottom forming a rhombus. The rounded edges match the circular holes on the flange of the product to be assembled. The first opening slot is used to facilitate the disassembly of the product to be assembled.

3. The chucking and positioning device for nut running according to claim 1, characterized in that, The pressure plate has a Y-shaped structure. The front end of the pressure plate has two branches forming a second opening groove, and each branch is connected to a washer. The rear end of the pressure plate is fixed to the reciprocating linear cylinder via screws. When the pressure plate moves down, the clamping force is transmitted to the product to be assembled by the washer.

4. The chucking and positioning device for nut running according to claim 1, characterized in that, The sleeve is divided into an upper section, a middle section, and a lower section. The upper end has a square hole, and the hole wall is machined with an arc-shaped groove for assembling a torque wrench; The middle section is a solid cylindrical section with a diameter of 7mm, which is used to cooperate with the support plate to ensure the coaxiality of the sleeve knob when it is turned. The lower end has a waist-shaped hole for engaging the self-locking nut for knob turning and a round deep hole for avoiding the round deep hole of the terminal block.

5. The chucking and positioning device for screwing nuts according to claim 4, characterized in that, The depth of the waist-shaped hole is less than the height of the self-locking nut.

6. The chucking and positioning device for nut running according to claim 1, characterized in that, The semicircular structure is a φ7.1mm semicircular structure.

7. The chucking and positioning device for nut running according to claim 1, characterized in that, The compound linear cylinder is also equipped with a first external threaded pneumatic quick connector for connecting a 6mm air intake guide pipe. The manual three-position five-way directional valve is also connected with a second external thread pneumatic quick connector for connecting an 8mm air inlet guide pipe, an air inlet pipe for air inlet delivery, a third external thread pneumatic quick connector for connecting the air inlet pipe, and a silencer.

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