An auxiliary tool for preventing the ear stopper of a double-ear washer from breaking

Abstract

The invention discloses an auxiliary tool for preventing the ear of a double-ear washer from breaking. The tool is installed and fixed on a bolt trigger, and the bolt trigger includes a body, a rotating shaft and a tightening sleeve passing through the body for tightening the connecting bolts. The auxiliary tool includes an auxiliary sleeve and a connecting pad, and is fixed to the body through sleeve bolts; the auxiliary sleeve is a hollow cylindrical tube, and a mounting flange is provided at one end of the cylindrical tube. The mounting flange is connected and fixed to the body through sleeve bolts passing through the connecting pad, and the inner wall of the end surface of the other end of the cylindrical tube is symmetrically provided with protrusions corresponding to the notch of the double-ear washer; the rotating shaft and the tightening sleeve of the bolt trigger are located on the axial center line of the auxiliary sleeve cylindrical tube. The auxiliary tool of the invention does not need to change the structure and function of the existing bolt trigger, and is easy to install, fix and use; the auxiliary sleeve limits and positions the double-ear washer to increase the shear force bearing area of ​​the double-ear washer, improves the assembly and installation efficiency of the cross rod and the qualified installation rate, and greatly reduces the damage of the double-ear washer.

Description

Technical Field

[0001] The invention belongs to the technical field of railway vehicle manufacturing and repair, and specifically relates to an auxiliary tool for preventing the breakage of a double-ear washer stop ear. The auxiliary tool is used in the assembly of a railway freight car bogie cross support device, and can effectively prevent the breakage of the double-ear washer stop ear during the installation process. Background Art

[0002] A cross support device is often used in the assembly of the cross rod of the railway freight car bogie. The cross support device includes a cross rod assembly, a rubber pad, a locking plate, a sign plate, a double ear washer, a connecting bolt and the like. When assembling the cross support of the railway freight car bogie, the operator first pre-assembles the above parts in the side frame support seat, and then tightens the connecting bolts with the cross rod intelligent trigger. Under normal circumstances, when the tightening torque is about to reach 675N.M, the double ear washer rotates with the bolt. Since the stop ear is fixed in the locking plate hole and cannot rotate, the stop ear of the double ear washer is deformed and broken due to the shear force. When the break occurs, almost every stop ear of the double ear washer will be deformed. The operator can only use new double ear washers to replace the broken double ear washers.

[0003] In order to avoid the breakage or deformation of the double-ear washer stop ear, the existing process is to adjust the intelligent trigger tightening parameters to roughen the surface of the sign plate. According to actual application conditions, the double-ear washer stop ear is still often broken when the cross-support device is installed through the above process. Observation of the broken double-ear washers shows that the contact surface with the bolts and the sign plate has been damaged. Summary of the invention

[0004] The present invention discloses an auxiliary tool for preventing the breakage of a double-ear washer stopper ear according to the shortcomings of the prior art. The present invention aims to provide an auxiliary installation tool for preventing the breakage of a double-ear washer stopper ear during the assembly of a crossbar of a railway freight car bogie.

[0005] The present invention is achieved through the following technical solutions:

[0006] An auxiliary tool for preventing the stop ear of a double-ear washer from breaking, the auxiliary tool is installed and fixed on a bolt trigger, the bolt trigger includes a body, a rotating shaft and a tightening sleeve passing through the body for tightening the connecting bolt, and is characterized in that: the auxiliary tool includes an auxiliary sleeve and a connecting pad, and is fixed to the body through a sleeve bolt;

[0007] The auxiliary sleeve is a hollow cylindrical tube with a mounting flange at one end. The mounting flange is connected and fixed to the machine body by means of sleeve bolts passing through the connecting pad. The inner wall of the end face of the other end of the cylindrical tube is symmetrically provided with protrusions corresponding to the notches of the double-ear gasket; the rotating shaft of the bolt trigger and the tightening sleeve are located on the axial center line inside the auxiliary sleeve cylindrical tube.

[0008] An axial reserved strip hole is arranged on the cylindrical wall of the auxiliary sleeve at the position of the sleeve bolts for fixing the mounting flange to the machine body.

[0009] The connecting pad of the present invention is a flat disc, and a pad mounting hole matching with the auxiliary sleeve mounting flange is arranged on the disc.

[0010] Furthermore, the protrusions include a trapezoidal protrusion and a triangular protrusion which are symmetrically arranged on the inner wall of the end surface of the cylindrical tube and match the notch of the double-ear gasket.

[0011] The trapezoidal protrusions are symmetrically arranged in a pair, and the triangular protrusions are symmetrically arranged in one or two pairs.

[0012] The auxiliary sleeve wall is provided with a through hole located at the position of the built-in tightening sleeve, which is an observation hole for observing the rotating shaft and the tightening sleeve.

[0013] The mounting flange is connected and fixed to the machine body through four sets of sleeve bolts passing through the connecting pad.

[0014] The benefits of the invention: The auxiliary tool of the invention is installed on the existing bolt trigger body, and there is no need to change the structure and function of the existing bolt trigger, and it is easy to install, fix and use. The auxiliary tool increases the shear force bearing area of ​​the double-ear washer through the restriction and positioning of the double-ear washer by the auxiliary sleeve, thereby improving the strength of the parts, and the ear piece no longer breaks, thereby improving the assembly and installation efficiency and installation qualification rate of the cross rod of the railway freight car bogie, greatly reducing the damage of the double-ear washer, and saving material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the auxiliary tool installation structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the auxiliary tool of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the auxiliary sleeve of the auxiliary tool of the present invention;

[0018] Figure 4 It is a schematic diagram of the assembly and application disassembly state of the cross bar of the auxiliary tool of the present invention;

[0019] Figure 5 It is a schematic diagram of the planar structure of a double-ear gasket;

[0020] Figure 6 It is a schematic diagram of the disassembled state of the existing cross bar assembly application.

[0021] The marks in the figure are:

[0022] 1 is the auxiliary sleeve, 2 is the sleeve bolt, 3 is the rotating shaft, 4 is the connecting pad, 5 is the machine body, and 6 is the tightening sleeve;

[0023] 11 is a protrusion, 11.1 is a trapezoidal protrusion, 11.2 is a triangular protrusion, 12 is an observation hole, 13 is an axial reserved strip hole, 14 is a mounting hole, 15 is a mounting flange, 41 is a pad mounting hole, and 51 is a body mounting hole;

[0024] 71 is a double-ear washer, 71.1 is a trapezoidal notch, 71.2 is a triangular notch, 71.3 is a stop ear, 72 is a connecting bolt, 73 is a marking plate, 74 is a locking plate, 75 and 76 are rubber pads, and 77 is a cross rod. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0026] Combined with the attached pictures.

[0027] The auxiliary tool of the present invention is used to prevent the ear stopper of a double-ear washer from breaking. The auxiliary tool is installed and fixed on a bolt trigger. The bolt trigger includes a body 5, a rotating shaft 3 and a tightening sleeve 6 passing through the body 5 for tightening the connecting bolt. The auxiliary tool includes an auxiliary sleeve 1 and a connecting pad 4, and is fixed to the body 5 through a sleeve bolt 2.

[0028] As shown in the figure, the auxiliary sleeve 1 is a hollow cylindrical tube with a mounting flange 15 at one end of the cylindrical tube. The mounting flange 15 is connected and fixed to the body 5 through the sleeve bolt 2 passing through the connecting pad 4. The inner wall of the end surface of the other end of the cylindrical tube is symmetrically provided with a protrusion 11 corresponding to the notch of the double-ear washer 71; the rotating shaft 3 of the bolt trigger and the tightening sleeve 6 are located on the axial center line inside the cylindrical tube of the auxiliary sleeve 1.

[0029] An axial reserved strip hole 13 is arranged on the cylindrical wall of the auxiliary sleeve 1 at the position of the sleeve bolt 2 for fixing the mounting flange 15 and the body 5 .

[0030] The connecting pad 4 is a flat disc, and a pad mounting hole 41 matching with the mounting flange 15 of the auxiliary sleeve 2 is arranged on the disc.

[0031] The protrusion 11 comprises a trapezoidal protrusion 11.1 and a triangular protrusion 11.2 which are symmetrically arranged on the inner wall of the end surface of the cylindrical tube and match the notch of the double-ear gasket 71.

[0032] As shown in the figure, in this example, the trapezoidal protrusions 11.1 are symmetrically arranged in a pair, and the triangular protrusions 11.2 are symmetrically arranged in one or two pairs.

[0033] The wall of the auxiliary sleeve 1 is provided with a through hole 12 located at the position of the built-in tightening sleeve 6 for observing the rotating shaft and the tightening sleeve.

[0034] In this example, the mounting flange 15 is connected and fixed to the machine body 5 by four sets of sleeve bolts 2 passing through the connecting pad 4.

[0035] like Figure 6 As shown, the conventional cross support device is composed of a cross rod assembly 77, rubber pads 75, 76, a locking plate 74, a marking plate 73, and a double-ear washer 71 connected by a connecting bolt 72. In a conventional assembly method, the rotating shaft 3 of the bolt trigger drives the tightening sleeve 6 to rotate and tighten the connecting bolt 72 to connect and fix the cross rod assembly 77, rubber pads 75, 76, the locking plate 74, the marking plate 73, and the double-ear washer 71.

[0036] like Figure 4 As shown, Figure 4 It is a schematic diagram of the assembly and application disassembly state of the cross rod of the auxiliary tool of the present invention. The bottom of the auxiliary sleeve 1 of the present invention is similar to the outer contour of the double-ear washer 71. When the double-ear washer 71 is about to rotate, the protrusion 11 at the bottom of the auxiliary sleeve 1 limits the notch set on the outer circle of the double-ear washer 71. The original shear force bearing area is only the stop ear 71.3. When the protrusion 11 at the bottom of the auxiliary sleeve 1 is tightened, the contact area of ​​at least four protrusions 11 is increased. When the shear force is the same, the force bearing area increases, the strength of the part increases, and the stop ear 71.3 is prevented from breaking.

[0037] like Figure 1 and Figure 2 As shown, the auxiliary sleeve 1 is installed on the body 5 of the intelligent trigger, and a connecting pad 4 is provided and connected and fixed by a sleeve bolt 2. The sleeve bolt 2 can be connected by an M8X30 bolt and an M8 washer.

[0038] like Figure 3 As shown, the auxiliary sleeve 1 of the present invention is a hollow cylindrical cylinder, with a mounting flange 15 at one end of the cylindrical cylinder, the mounting flange 15 is connected and fixed to the machine body 5 through the sleeve bolt 2 through the connecting pad 4, and the inner wall of the end surface of the other end of the cylindrical cylinder is symmetrically provided with a protrusion 11 that matches the notch of the double-ear washer 71. In this example, the protrusion 11 includes a trapezoidal protrusion 11.1 and a triangular protrusion 11.2 that are symmetrically arranged on the inner wall of the end surface of the cylindrical cylinder and match the notch of the double-ear washer 71; when the double-ear washer 71 rotates, the protrusion 11 limits the notch on the double-ear washer 71 to prevent it from rotating.

[0039] After using the auxiliary tool of the present invention, the installation method of the cross support device is as follows: Figure 4As shown, the cross rod assembly 77, rubber pads 75, 76, locking plate 74, sign plate 73, double-ear washer 71, and connecting bolt 72 are pre-fixed in sequence; the bolt trigger including the auxiliary tool is combined with the connecting bolt 72, and the tightening sleeve 6 is driven to combine with the connecting bolt 72. After the equipment is started, the connecting bolt 72 begins to rotate, the torque is transmitted to each component, and gradually rotates to tighten each part. Under normal circumstances, the protrusion 11 at the front end of the auxiliary sleeve 1 and the notch of the double-ear washer 71 are combined to limit the rotation of the double-ear washer 71. When the tightening torque reaches 675N.M, the equipment stops rotating, and the positions of the double-ear washer 71, the sign plate 73, and the locking plate 74 do not change further. Including each protrusion 11 and the corresponding notch, the ear piece 71.3 disperses the torque of the rotational force, so that the double-ear washer 71 is balanced and the position is fixed, completing the installation of the cross support device.

Claims

1. An auxiliary tool for preventing the stop ears of a double-ear washer from breaking, the auxiliary tool is mounted and fixed on a bolt trigger, the bolt trigger comprises a body, a rotating shaft passing through the body for tightening the connecting bolt, and a tightening sleeve, characterized in that: The auxiliary tool comprises an auxiliary sleeve and a connecting pad, and is fixed to the machine body by sleeve bolts; The auxiliary sleeve is a hollow cylindrical tube with a mounting flange at one end of the cylindrical tube. The mounting flange is connected and fixed to the machine body through a sleeve bolt passing through a connecting pad. The inner wall of the end face of the other end of the cylindrical tube is symmetrically provided with protrusions corresponding to the notches of the double-ear gasket. The protrusions include trapezoidal protrusions and triangular protrusions symmetrically arranged on the inner wall of the end face of the cylindrical tube and matching the notches of the double-ear gasket. An axial reserved strip hole is arranged on the cylindrical tube wall at the position of the sleeve bolt that fixes the mounting flange to the machine body; the rotating shaft of the bolt trigger and the tightening sleeve are located on the axial center line inside the cylindrical tube of the auxiliary sleeve.

2. The auxiliary tool for preventing the double-ear gasket from breaking according to claim 1, characterized in that: The connecting pad is a flat disc, and a pad mounting hole matching the auxiliary sleeve mounting flange is arranged on the disc.

3. The auxiliary tool for preventing the double-ear gasket from breaking according to claim 2, characterized in that: The trapezoidal protrusions are symmetrically arranged in a pair, and the triangular protrusions are symmetrically arranged in one or two pairs.

4. The auxiliary tool for preventing the double-ear gasket from breaking according to claim 2, characterized in that: The auxiliary sleeve wall is provided with a through hole located at the position of the built-in tightening sleeve, which is an observation hole for observing the rotating shaft and the tightening sleeve.

5. The auxiliary tool for preventing the double-ear gasket from breaking according to claim 2, characterized in that: The mounting flange is connected and fixed to the machine body through four sets of sleeve bolts passing through the connecting pad.

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