Pre-installation device for fastening assembly in narrow and small space

Abstract

The utility model discloses a pre-installation device for a fastening assembly in a narrow and small space, which belongs to the technical field of assembly of parts of rail transit vehicles and is provided with a device main body which is provided with a core column capable of rotating; the clamping mechanism is arranged in the device main body, and the clamping mechanism is provided with a flange plate and a connecting piece fixedly connected with the core column; the clamping jaws are evenly distributed on the flange plate in the circumferential direction, and the clamping jaws are connected with the flange plate in a sliding mode. The clamping device further comprises a flexible supporting piece, one end of the flexible supporting piece is connected with the clamping jaws, and the other end of the flexible supporting piece is connected with the device body so that the flexible supporting piece can be clamped on the clamping jaws in the working state. The core column rotates to drive the connecting arms to rotate to drive the clamping jaws to synchronously move to circumferentially clamp the fastening assembly and drive the flexible supporting pieces to stretch to circumferentially support the fastening assembly to be centered, and the clamping device can work in a narrow space and has the advantages of being convenient to use and high in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit vehicle parts assembly, in particular to a pre-installation device for fastening components in a narrow space. Background Art

[0002] Railway passenger car production involves numerous components. Operators must use the correct fasteners (bolts and washers, or nuts and washers) for each component's mounting point, installing and tightening them in the correct sequence to ensure the quality and safety of the assembled system. Due to the varying requirements of different component mounting points, fasteners of varying specifications, sizes, materials, and styles are used.

[0003] Currently, when pre-installing fastener components in a confined space where the arm cannot directly reach, the common method is to first place the corresponding fastener component in a ratchet socket of the corresponding specification, then extend the socket to the desired installation point, and rotate the socket to pre-install the fastener component. This method of installing fastener components is very prone to falling or incorrect stacking order of fastener components. In addition, the operator needs to use sockets of different specifications to adapt to the fastener components to be installed, causing the operator to repeatedly install parts, increasing work time and labor intensity. In actual installation operations, it is difficult to find a universal device for pre-installing fastener components. Not only must it adapt to operations in confined spaces, but it must also ensure that the order of fastener components at the installation points is correct.

[0004] Therefore, based on the above problems, there is an urgent need to develop a pre-installed fastening device that is suitable for working in a small space, is easy to use, has strong versatility, and is suitable for various fastening components. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects of the prior art and provide a pre-installation device for fastening components in a narrow space, which can replace the original ratchet socket pre-installation and can operate in a narrow space. It is easy to use and has strong versatility. At the same time, it eliminates the problem of easy slippage of fastening components due to the large number of specifications and the correct order of fastening components, thereby improving product safety and quality and saving operation time.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] The utility model discloses a pre-installation device for a fastening assembly in a narrow space, comprising:

[0008] a device body having a rotatable core;

[0009] a clamping mechanism disposed in the device body, the clamping mechanism comprising a flange and a connecting piece fixedly connected to the stem; and

[0010] Clamping jaws uniformly distributed circumferentially on the flange, the clamping jaws being slidably connected to the flange;

[0011] The connecting member is rotatably connected to a connecting arm having a number matching that of the clamping jaws, and the ends of the connecting arms are connected to the clamping jaws.

[0012] A flexible supporting member, one end of which is connected to the clamping jaws and the other end is connected to the device body, so that in the working state, the rotation of the core column drives the rotation of the connecting arm to drive the clamping jaws to synchronously displace to circumferentially clamp the fastening component, and drives the flexible supporting member to extend circumferentially to support the centering of the fastening component.

[0013] Furthermore, a negative pressure structure is arranged inside the device body to provide adsorption force.

[0014] Furthermore, the negative pressure structure includes an air suction channel formed on the core column and a negative pressure motor installed at the rear end of the device body and connected to the air suction channel;

[0015] A plurality of air inlet holes are evenly distributed on the surface of the flange located on the fastening assembly side, and the air inlet holes are communicated with the air suction channel.

[0016] Furthermore, it also includes a magnetic attraction part fixedly connected to the end of the core column, which is used for magnetic attraction and fastening components.

[0017] Furthermore, the clamping jaw includes a main body, a claw portion is formed on one side of the main body, and a connecting column is formed on the other side. The main body is slidingly connected to the flange, the connecting column is rotationally connected to the connecting arm, and a nut is threadedly connected to the end of the connecting column.

[0018] Furthermore, the connecting arm is constructed as an arc-shaped arm, one end of which is provided with an axial hole for rotationally connecting with the connecting column, and the other end is fixedly connected with a protruding column, and the protruding column is inserted into the connecting hole of the connecting piece.

[0019] Furthermore, the device body includes a bottom tube, an outer cover fixedly connected to the head end of the bottom tube, the core column rotatably connected to the bottom tube, a connecting tube fixedly connected to the tail end of the core column, and a rear cover fixedly connected to the tail end of the connecting tube;

[0020] A battery is installed in the connecting pipe, and a switch for controlling the start or shut down of the negative pressure motor is installed on the outer wall of the connecting pipe.

[0021] Furthermore, an extension tube with a diameter smaller than that of the bottom tube is formed at one end of the bottom tube, the extension tube is connected to the connecting tube, and the other end of the bottom tube is fixedly connected to the outer cover and forms a chamber with the outer cover to accommodate the clamping mechanism.

[0022] Furthermore, a disc is provided at the top of the core column, and a limiting bead is provided on the outer wall of the disc and is engaged with the annular guide groove opened on the inner wall of the bottom tube. A limiting groove is formed in the annular guide groove for engaging with the limiting bead.

[0023] Furthermore, one end of the flexible supporting member is fixedly connected to the top end of the clamping jaws through a screw, and the other end is fixedly connected to the outer cover through a clamping sleeve.

[0024] In the above technical solution, the utility model provides a pre-installation device for fastening components in a narrow space, which has the following beneficial effects:

[0025] Compared with the prior art, the pre-installation device for fastening components in a narrow space provided by the present invention replaces the previous method of frequently alternating the use of tools of various specifications with a screw-on clamping mechanism, which can realize the installation of fastening components of different sizes within a certain range, and has good versatility. When the clamping mechanism clamps, it drives the flexible support member to stretch to form a tapered structure, and the centripetal force makes the fastening components more concentric, thereby improving the operation efficiency.

[0026] Secondly, the extended base of this device can be extended into a small space for operation, avoiding the problem of being unable to operate in a small space and improving production efficiency;

[0027] In addition, when the device pre-installs the fastening components, the dual forces of negative pressure adsorption of the negative pressure structure air and magnetic adsorption of the strong magnetic parts are applied to the fastening components to be installed, thereby improving the stability of the clamping of the fastening components, eliminating the disadvantage of slipping of the pre-installed fastening components of previous devices, improving construction efficiency and reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0029] Figure 1 This is a schematic diagram of the overall structure of the pre-installation device for fastening components in a narrow space disclosed in the utility model;

[0030] Figure 2 This is an exploded view of the narrow space fastening assembly pre-installation device disclosed in the utility model;

[0031] Figure 3 yes Figure 2 A magnified view of position A;

[0032] Figure 4 This is an exploded view from another perspective of the narrow space fastening component pre-installation device disclosed in the utility model;

[0033] Figure 5 This is an enlarged view of position 4B;

[0034] Figure 6 This is an enlarged view of the 4C position;

[0035] Figure 7 This is an axonometric view of the assembly state of the core shaft and the clamping mechanism of the pre-installation device for the narrow space fastening assembly disclosed in the utility model;

[0036] Figure 8 This is an axonometric view from another perspective of the assembly state of the core shaft and the clamping mechanism of the pre-installation device for the narrow space fastening assembly disclosed in the utility model;

[0037] Figure 9 This is a bottom pipe structure diagram of a pre-installation device for fastening components in a narrow space disclosed in the utility model;

[0038] Figure 10 This is a structural diagram of the core shaft of the pre-installation device for fastening components in a narrow space disclosed in the utility model;

[0039] Figure 11 This is a structural diagram of the flange of the pre-installation device for fastening components in a narrow space disclosed in the utility model;

[0040] Figure 12 This is a structural diagram of the clamping jaws of the pre-installation device for fastening components in a narrow space disclosed in the utility model;

[0041] Figure 13 This is a structural diagram of a connector for a pre-installation device for a narrow space fastening assembly disclosed in the utility model;

[0042] Figure 14 This is a structural diagram of the connecting arm of the pre-installation device for fastening components in a narrow space disclosed by the utility model.

[0043] Description of reference numerals:

[0044] 10. Device body: 11. Core column; 111. Stop bead; 12. Outer cover; 13. Bottom tube; 131. Annular guide groove; 132. Stop groove; 14. Connecting tube; 15. Back cover; 16. Switch; 17. Battery;

[0045] 20. Clamping mechanism; 21. Flange; 22. Clamping jaws; 221. Claw; 222. Connecting column; 23. Connecting piece; 231. Connecting hole; 24. Connecting arm; 241. Raised column; 25. Nut;

[0046] 30. Flexible support member; 31. Screw; 32. Card sleeve;

[0047] 40. Magnet nut; 41. Strong magnet;

[0048] 50. Negative pressure motor; 51. Air suction channel; 52. Air inlet;

[0049] 60. Chamber. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0051] See also Figure 1-8 As shown;

[0052] The utility model discloses a pre-installation device for fastening components in a narrow space, comprising: a device body 10, a clamping mechanism 20, and a flexible supporting member 30;

[0053] The device body 10 has a rotatable stem 11;

[0054] The clamping mechanism 20 is placed in the device body 10, and the clamping mechanism 20 includes a flange 21, a connecting piece 23 fixedly connected to the core column 11, and clamping jaws 222 evenly distributed on the flange 21 in the circumferential direction;

[0055] The clamping jaws 222 are slidably connected to the flange 21. The connecting member 23 is rotatably connected to connecting arms 24 that match the number of the clamping jaws 222. The ends of the connecting arms 24 are connected to the clamping jaws 222.

[0056] One end of the flexible support member 30 is connected to the clamping jaw 222 and the other end is connected to the device body 10;

[0057] In the working state, the core column 11 rotates, thereby driving the connecting arm 24 to rotate and drive the clamping jaws 222 to synchronously displace to circumferentially clamp the fastening assembly, and drive the flexible support member 30 to extend to circumferentially support the fastening assembly. The fastening assembly includes a bolt and at least one washer combination, or a nut and at least one washer combination;

[0058] The narrow space fastening assembly pre-installation device uses a device body 10 to extend into a narrow gap, a clamping mechanism 20 is installed in the device body 10, and the device body 10 is fixedly connected to the connecting piece 23 of the clamping mechanism 20 through the core column 11. Figure 13As shown, the connecting piece 23 is a hexagonal prism, and a center hole is opened on the connecting piece 23. The center hole is fixedly connected to the core column 11 in the form of a key and a keyway. When the core column 11 rotates, the connecting piece 23 rotates accordingly. The clamping jaws 222 include six, and the flange 21 is provided with a sliding groove in the circumference. The clamping jaws 222 are slidably connected to the sliding groove of the flange 21. One end of the connecting arm 24 is movably connected to the connecting piece 23, and the other end is movably connected to the lower part of the clamping jaw 222, thereby driving the core column 11. The connecting piece 23 synchronously pulls the six connecting arms 24 to move and drives the clamping jaws 222 to move along the sliding groove, so that the clamping jaws 222 synchronously clamp the bolts in the fastening assembly circumferentially. At the same time, the clamping jaw 222 drives the flexible supporting piece 30 to extend to form a tapered supporting mouth, which circumferentially supports the bolts and gaskets in the fastening assembly to align, prevent the bolts and gaskets from disengaging, and keep the bolt posture correct, so that they can be accurately pre-assembled in the mounting hole;

[0059] See also Figure 2 As shown:

[0060] Preferably, a negative pressure structure is also provided inside the device body 10 to provide adsorption force.

[0061] The negative pressure structure includes an air suction channel 51 formed on the core column 11 and a negative pressure motor 50 installed at the rear end of the device body 10 and connected to the air suction channel 51;

[0062] The surface of the flange 21 on the fastening assembly side is evenly distributed with a plurality of air inlet holes 52, which are connected to the air suction channel 51. The air inlet holes 52 on the flange 21 cover an area sufficient for fastening assemblies of M6, M8, M10, and M13 specifications, making it easy to adsorb fastening assemblies of different specifications. During use, the negative pressure motor 50 works to provide adsorption force, and the air suction channel 51 takes in air through the air inlet holes 52. The device body 10 covers the outside of the fastening assembly to form a chamber 60. When air is taken in by the air inlet holes 52, an adsorption force is generated on the fastening assembly, thereby placing the fastening assemblies in the correct stacking order into the chamber 60 formed by the device body 10.

[0063] See also Figure 4 shown

[0064] Preferably, the device also includes a magnetic attraction part fixedly connected to the end of the core column 11, which is used to magnetically adsorb the fastening component. Specifically, the magnetic attraction part includes a magnet nut 40 fixedly connected to the core column 11, and a strong magnet 41 is fixedly connected to the magnet nut 40. At this time, the negative pressure suction force and the strong magnetic attraction force act on the fastening component at the same time, which can effectively prevent it from slipping.

[0065] See also Figure 12 As shown:

[0066] Preferably, the clamping jaw 222 includes a main body, a claw portion 221 is formed on one side of the main body, and a connecting column 222 is formed on the other side. The main body is slidingly connected to the flange 21, the connecting column 222 is rotationally connected to the connecting arm 24, and a nut 25 is threadedly connected to the end of the connecting column 222.

[0067] See also Figure 14 As shown, the connecting arm 24 is constructed as an arc-shaped arm, one end of the connecting arm 24 is provided with an axial hole for rotationally connecting with the connecting column 222, and the other end is fixedly connected with a protruding column 241, which is inserted into the connecting hole 231 of the connecting member 23.

[0068] See also Figure 2 As shown:

[0069] Preferably, the device body 10 includes a bottom tube 13, an outer cover 12 fixedly connected to the head end of the bottom tube 13, a core column 11 rotatably connected to the bottom tube 13, a connecting tube 14 fixedly connected to the tail end of the core column 11, and a rear cover 15 fixedly connected to the tail end of the connecting tube 14;

[0070] A battery 17 is installed in the connecting tube 14 to provide power to the negative pressure motor 50 . A switch 16 for controlling the start or stop of the negative pressure motor 50 is installed on the outer wall of the connecting tube 14 .

[0071] See also Figure 4 As shown:

[0072] Preferably, an extension tube with a diameter smaller than that of the bottom tube 13 is formed at one end of the bottom tube 13. The extension tube increases the overall length of the bottom tube 13 to facilitate insertion into a narrow space. The extension tube is connected to the connecting tube 14. The other end of the bottom tube 13 is fixedly connected to the outer cover 12 and forms a chamber 60 with the outer cover 12 to accommodate the clamping mechanism 20.

[0073] See also Figure 6 、 9 、10 as shown:

[0074] Preferably, a disc is provided at the top of the stem 11, which has a clearance fit with the outer wall of the bottom tube 13, and a limiting bead 111 is provided on the outer wall of the disc. The limiting bead 111 is engaged with an annular guide groove 131 provided on the inner wall of the bottom tube 13, and a limiting groove 132 is formed in the annular guide groove 131 for engaging with the limiting bead 111. When in use, the stem 11 rotates relative to the bottom tube 13, and the limiting bead 111 slides in the annular guide groove 131. When encountering the limiting groove 132, it engages with the limiting groove 132, generating a force that prevents the stem 11 from rotating.

[0075] See also Figure 2 、 5 As shown:

[0076] Preferably, the flexible support member 30 is a flexible rubber strip, one end of the flexible support member 30 is fixedly connected to the top of the clamping jaw 222 by a screw 31, and the other end is fixedly connected to the outer cover 12 by a sleeve 32. When in use, the flexible support member 30 is stretched when the clamping jaw 222 moves toward the axial direction of the core column 11.

[0077] In the above technical solution, the utility model provides a pre-installation device for fastening components in a narrow space, the working principle of which is as follows:

[0078] The rotating connecting tube 14 drives the core column 11 to rotate, and the limiting bead 111 on the disk of the core column 11 slides in the annular guide groove 131 in the bottom tube 13. A limiting groove 132 is provided in the annular guide groove 131. The limiting bead 111 enters the limiting groove 132 to limit and stop the core column 11. At this time, the air suction channel 51 in the core column 11 is connected with the air inlet hole 52 on the flange 21. The connecting piece 23 rotates synchronously with the core column 11 to drag the connecting arm 24. The connecting arm 24 pulls the corresponding clamping jaws 22 inward to generate a centripetal tightening force. The inward movement of the six clamping jaws 22 pulls the six flexible support members 30 to generate a natural deflection angle, forming a support port with a tapered structure, which can effectively center the fastening component and limit the position of the fastening component.

[0079] When the switch 16 is turned on, the negative pressure motor 50 starts to generate suction. The suction channel 51 in the core column 11 and the air channel built into the flange 21 rotate to connect the air channels, which apply suction to the air inlets 52 at different positions of the flange 21, generating an adsorption force. The fastening components are placed in the formed limited accommodation space in the correct stacking order. At this time, the suction force and the strong magnet act on the fastening components simultaneously to prevent them from slipping.

[0080] When the device is sent to a narrow space working environment, the fastening component pre-installation point needs to be applied, and the rotating connecting pipe 14 drives the device to complete the pre-installation of the fastening component;

[0081] After the device completes the pre-installation of the fastening assembly, the switch 16 is turned off, and the connecting tube 14 is rotated counterclockwise to loosen the clamping jaws 22 and return them to the initial position.

[0082] The maximum opening angle of the clamping jaws 22 of the device determines the maximum diameter of the applicable nut; the minimum diameter of the applicable nut is determined according to the limit compression size of the clamping jaws 22. Nuts with diameter values within this range can be used with the device of this specification of pre-installed fastening components.

[0083] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pre-installation device for fastening components in a narrow space, characterized in that: include: A device body (10) having a rotatable core (11); A clamping mechanism (20) is placed in the device body (10), and the clamping mechanism (20) comprises a flange (21) and a connecting piece (23) fixedly connected to the core column (11); and Clamping jaws (22) are uniformly distributed on the flange (21) in a circumferential direction, and the clamping jaws (22) are slidably connected to the flange (21); The connecting member (23) is rotatably connected to a connecting arm (24) whose number matches the clamping jaws (22), and the end of the connecting arm (24) is connected to the clamping jaws (22); it also includes a flexible supporting member (30), one end of which is connected to the clamping jaws (22) and the other end is connected to the device body (10), so that in the working state, the core column (11) rotates to drive the connecting arm (24) to rotate and drive the clamping jaws (22) to synchronously displace and circumferentially clamp the fastening component, and drive the flexible supporting member (30) to extend and circumferentially support the centering of the fastening component.

2. A pre-installation device for fastening components in a narrow space according to claim 1, characterized in that ； A negative pressure structure is also arranged inside the device body (10) to provide adsorption force.

3. A pre-installation device for fastening components in a narrow space according to claim 2, characterized in that ； The negative pressure structure comprises an air suction channel (51) formed on the core column (11) and a negative pressure motor (50) installed at the rear end of the device body (10) and connected to the air suction channel (51); A plurality of air inlet holes (52) are evenly distributed on the surface of the flange (21) located on the fastening assembly side, and the air inlet holes (52) are communicated with the air intake channel (51).

4. A pre-installation device for fastening components in a narrow space according to claim 3, characterized in that ； It also includes a magnetic attraction piece fixedly connected to the end of the core column (11) and used for magnetically absorbing the fastening component.

5. A narrow space fastening assembly pre-installation device according to claim 3, characterized in that; The clamping jaw (22) includes a body, a claw portion (221) is formed on one side of the body, and a connecting column (222) is formed on the other side. The body is slidably connected to the flange (21), the connecting column (222) is rotationally connected to the connecting arm (24), and a nut (25) is threadedly connected to the end of the connecting column (222).

6. A narrow space fastening assembly pre-installation device according to claim 5, It is characterized by: The connecting arm (24) is constructed as an arc-shaped arm. One end of the connecting arm (24) is provided with an axial hole for rotationally connecting with the connecting column (222). The other end is fixedly connected with a protruding column (241). The protruding column (241) is inserted into the connecting hole of the connecting member (23).

7. A pre-installation device for fastening components in a narrow space according to any one of claims 3 to 6, characterized in that ； The device body (10) comprises a bottom tube (13), an outer cover (12) fixedly connected to the head end of the bottom tube (13), the core column (11) rotatably connected to the bottom tube (13), a connecting tube (14) fixedly connected to the tail end of the core column (11), and a rear cover (15) fixedly connected to the tail end of the connecting tube (14); A battery (17) is installed in the connecting tube (14), and a switch (16) for controlling the start or shut down of the negative pressure motor (50) is installed on the outer wall of the connecting tube (14).

8. The narrow space fastening assembly pre-installation device according to claim 7, characterized in that ； An extension tube having a smaller diameter than the bottom tube (13) is formed at one end of the bottom tube (13), and the extension tube is connected to the connecting tube (14). The other end of the bottom tube (13) is fixedly connected to the outer cover (12) and forms a chamber (60) with the outer cover (12) for accommodating the clamping mechanism (20).

9. A narrow space fastening assembly pre-installation device according to claim 7, characterized in that; A disc is provided at the top of the core column (11), and a limiting bead (111) is provided on the outer wall of the disc and is engaged with an annular guide groove (131) provided on the inner wall of the bottom tube (13). A limiting groove (132) is formed in the annular guide groove (131) for engaging with the limiting bead (111).

10. A narrow space fastening assembly pre-installation device according to claim 7, It is characterized by: One end of the flexible supporting member (30) is fixedly connected to the top end of the clamping jaw (22) via a screw (31), and the other end is fixedly connected to the outer cover (12) via a clamping sleeve (32).

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