A latch sleeve advance positioning method and advance positioning device

Abstract

The application discloses a latch sleeve advance positioning method and advance positioning device, which comprises the following steps: designing an upper beam, marking the longitudinal center line and the transverse center line of the upper beam, assembling a latch support on both sides of the bottom of the upper beam, assembling a pair of upper pads at the bottom end of the upper beam, marking the longitudinal center line and the transverse center line of the latch support, locating the center of the latch hole of the latch support on the longitudinal center line, boring the latch hole of the latch support, placing the upper beam and the latch support assembly on the upper cover plate of the machine arm, installing the processed latch sleeve at the front end of the latch, and pushing the latch so that the latch sleeve is just pushed into the ear beam hole on the machine arm. According to the application, the processed latch sleeve is pushed into the ear beam holes on both sides of the machine arm along the installation path of the bridge crane support leg to be installed according to the upper beam and the latch support, and then is positioned and welded, so that the workload of welding and then processing the latch sleeve is reduced, and the coaxiality of the latch sleeves on both sides of the ear beam is further ensured.

Description

Technical Field

[0001] This invention relates to the field of auxiliary installation equipment for bridge erecting machines, and in particular to a method and device for pre-positioning pin sleeves. Background Technology

[0002] The bridge erecting machine uses outriggers mounted on both sides to adjust their positions, accommodating the erection of single- and double-track box girders respectively. The crossbeams on the outriggers are hinged to the boom via boom pins and hydraulic cylinders. By changing the position of the pins, bridges of different spans can be erected. The pins need to be installed in pin positioning sleeves. The bridge erecting machine typically uses 12 pin positioning sleeves for outrigger positioning, symmetrically arranged in pairs within the ear beam holes on both sides of the boom. The coaxiality of corresponding holes on both sides is 0.1, and the pins and pin sleeves are clearance-fitted.

[0003] To ensure smooth insertion and removal of the outrigger pin shaft within the pin sleeve, the coaxiality of the pin sleeves on both sides of the ear beam must be guaranteed. The traditional positioning and installation method involves leaving a 5mm machining allowance on one side of the pin sleeve. During the overall assembly of the machine arm, the pin sleeve assembly is directly welded into the ear beam hole. After the machine arm is welded, it is transported to the machining workshop for further machining of the pin sleeves, ensuring coaxiality on both sides of the ear beam. Due to the large size and weight of the machine arm, transportation during machining and transfer is extremely difficult. A CNC gantry milling machine is used, requiring six repositioning operations to complete the machining of all the pin sleeves. This process is challenging, time-consuming, and costly. Summary of the Invention

[0004] To address the technical problems mentioned in the background section, this invention provides a method and device for pre-positioning a pin sleeve.

[0005] This invention adopts the following technical solution: a method for pre-positioning a pin sleeve, wherein the pin sleeve is used to position and install the outriggers of a bridge erecting machine on both sides of the machine arm, characterized by comprising the following steps:

[0006] S1: Design the upper crossbeam according to the cross-sectional length of the arm to be installed, and mark the longitudinal center line and transverse center line of the upper crossbeam;

[0007] S2: Assemble the pin supports on both sides of the bottom of the upper crossbeam, with a distance A between the pair of pin supports;

[0008] S3: A pair of upper pads are symmetrically assembled at the bottom of the upper crossbeam. The pair of upper pads are located inside the pair of pin supports. The lower surface of the upper pads is milled to ensure that the height of the upper pads is B.

[0009] S4: Mark the longitudinal centerline and transverse centerline of the pin support, ensuring that the longitudinal centerline coincides with the longitudinal centerline of the upper crossbeam, the center of the pin hole of the pin support is located on the longitudinal centerline, and the transverse centerline of the pin support coincides with the centerline of the arm lug hole.

[0010] S5: Boring the pin hole on the pin support to ensure that the distance between the center hole of the pin support and the bottom surface of the upper pad is C;

[0011] S6: Align and place the upper crossbeam and pin support assembly onto the upper cover plate of the machine arm. Ensure that the transverse centerline of the upper crossbeam coincides with the centerline of the ear beam holes on both sides of the machine arm through the observation hole on the upper crossbeam, and that the longitudinal centerline of the upper crossbeam coincides with the longitudinal centerline of the machine arm.

[0012] S7: Install the pin on the pin support, and install the machined pin sleeve on the front end of the pin. The size of the pin sleeve is compatible with the diameter of the ear beam hole on the machine arm.

[0013] S8: Push the pin so that the pin pushes the pin sleeve into the ear beam hole on the arm;

[0014] S9: Spot weld the fixing pin sleeves on both sides of the arm simultaneously;

[0015] S10: Repeat steps S6-S9 above to weld the remaining pin sleeves in sequence.

[0016] Furthermore, the sum of the height B and the spacing C is equal to the vertical distance between the bottom surface of the upper crossbeam and the center of the upper ear beam hole of the machine arm.

[0017] Furthermore, in step S7, the pin and the pin sleeve are connected by a transition fit.

[0018] Furthermore, the present invention also provides a pin sleeve pre-positioning device, including an upper crossbeam, a pair of pin supports symmetrically installed at the bottom of both ends of the upper crossbeam, and pin holes on the pair of pin supports arranged coaxially; a pair of upper pads symmetrically arranged at the center of the bottom of the upper crossbeam; and pins inserted into the pair of pin supports for pushing the pin sleeve into the ear beam hole of the machine arm.

[0019] Furthermore, a through observation hole is provided at the center of the top of the upper crossbeam.

[0020] Compared with the prior art, the advantages of the present invention are as follows: The pre-positioning method of the pin sleeve designed in the present invention pushes the processed pin sleeve into the ear beam holes on both sides of the arm according to the installation path of the support leg of the bridge erecting machine to be installed through the upper crossbeam and the pin support, and then positions and welds it. This reduces the workload of welding the pin sleeve before processing, solves the problem of transportation difficulties when large parts are transferred, and at the same time, further ensures the coaxiality of the pin sleeves on both sides of the ear beam. Attached Figure Description

[0021] Figure 1 This is an installation schematic diagram of the pre-positioning method for the pin sleeve of the present invention;

[0022] Figure 2 This is a scribing diagram of the arm of the present invention;

[0023] Figure 3 This is a scribed diagram of the upper crossbeam of the present invention;

[0024] Figure 4 This is a scribe line drawing of the pin support of the present invention.

[0025] in:

[0026] 1-Upper crossbeam, 2-Pin support, 3-Pin hole, 4-Upper pad, 5-Pin, 6-Pin sleeve, 7-Observation hole, 8-Machine arm, 9-Ear beam hole. Detailed Implementation

[0027] The following description, with reference to the accompanying drawings, is provided to facilitate understanding of the technical solutions of the present invention by those skilled in the art. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention.

[0028] In the following detailed description, numerous specific details are set forth for ease of explanation to provide a full understanding of embodiments of the invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0029] It should be noted that the pin sleeve designed in this embodiment is used to position and install the bridge erecting machine's outriggers on both sides of the machine arm.

[0030] Please combine Figure 1-4 The method for pre-positioning the pin sleeve includes the following steps:

[0031] First, install the upper crossbeam and pin support in place according to the drawings, including step 1, designing the upper crossbeam according to the cross-sectional length of the arm to be installed, and marking the longitudinal center line and transverse center line of the upper crossbeam.

[0032] Step 2: Assemble the pin supports on both sides of the bottom of the upper crossbeam. The distance between a pair of pin supports is A. A ensures that the length of the pin shaft matches the ear beam holes on both sides of the bridge erecting machine's legs.

[0033] Step 3: symmetrically assemble a pair of upper pads at the bottom of the upper crossbeam. The pair of upper pads are set inside the pair of pin supports. Mill the lower surface of the upper pads to ensure that the height of the upper pads is B.

[0034] Step 4: Mark the longitudinal centerline and transverse centerline of the pin support, ensuring that the longitudinal centerline coincides with the longitudinal centerline of the upper crossbeam, the center of the pin hole of the pin support is located on the longitudinal centerline, and the transverse centerline of the pin support coincides with the transverse centerline of the arm lug hole.

[0035] Step 5: Bor the pin hole on the pin support to ensure that the distance between the center hole of the pin support and the bottom surface of the upper pad is C.

[0036] Step 6: Align and place the upper crossbeam and pin support assembly onto the upper cover plate of the boom. Ensure that the transverse centerline of the upper crossbeam coincides with the centerline of the ear beam holes on both sides of the boom through the observation hole on the upper crossbeam, and that the longitudinal centerline of the upper crossbeam coincides with the longitudinal centerline of the boom. In practice, the sum of height B and spacing C is equal to the vertical distance between the bottom surface of the upper crossbeam and the center of the ear beam hole on the boom, so as to ensure that the pin hole of the pin support is concentric with the ear beam hole of the boom.

[0037] Step 7: Install the pin on the pin support and install the machined pin sleeve on the front end of the pin. The size of the pin sleeve is adapted to the diameter of the ear beam hole on the machine arm. During the specific installation, the pin and the pin sleeve are connected by a transition fit.

[0038] Step 8: Push the pin so that it pushes the pin sleeve into the ear beam hole on the machine arm.

[0039] Step 9: Spot weld the fixing pin sleeves on both sides of the arm simultaneously.

[0040] Step 10: Repeat steps S6-S9 above to weld the remaining pin sleeves in sequence.

[0041] In summary, the pin sleeve pre-positioning method designed in this invention pushes the processed pin sleeve into the ear beam holes on both sides of the machine arm according to the installation path of the support leg of the bridge erecting machine to be installed through the upper crossbeam and pin support, and then positions and welds it. This reduces the workload of welding the pin sleeve before processing, solves the problem of transportation difficulties when large parts are transferred, and further ensures the coaxiality of the pin sleeves on both sides of the ear beam.

[0042] This invention provides a pin sleeve pre-positioning device based on the above-mentioned pin sleeve pre-positioning method, such as... Figure 1 As shown, the system includes an upper crossbeam, with a pair of pin supports symmetrically installed at the bottom of both ends of the upper crossbeam. The pin holes on the pin supports are arranged coaxially. A pair of upper pads are symmetrically arranged at the center of the bottom of the upper crossbeam. Pins are inserted into the pair of pin supports to push the pin sleeves into the ear beam holes on the upper arm. A through observation hole is provided at the center of the top of the upper crossbeam.

[0043] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for pre-positioning a pin sleeve, wherein the pin sleeve is used to position and install the outriggers of a bridge erecting machine on both sides of the machine arm, characterized in that... Includes the following steps: S1: Design the upper crossbeam according to the cross-sectional length of the arm to be installed, and mark the longitudinal center line and transverse center line of the upper crossbeam; S2: Assemble a pair of pin supports on both sides of the bottom of the upper crossbeam, with a distance A between the pair of pin supports; S3: A pair of upper pads are symmetrically assembled at the bottom of the upper crossbeam. The pair of upper pads are located inside the pair of pin supports. The lower surface of the upper pads is milled to ensure that the height of the upper pads is B. S4: Mark the longitudinal centerline and transverse centerline of the pin support, ensuring that the longitudinal centerline coincides with the longitudinal centerline of the upper crossbeam, the center of the pin hole of the pin support is located on the longitudinal centerline, and the transverse centerline of the pin support coincides with the transverse centerline of the arm lug hole. S5: Boring the pin hole on the pin support to ensure that the distance between the center hole of the pin support and the bottom surface of the upper pad is C; S6: Align and place the upper crossbeam and pin support assembly onto the upper cover plate of the machine arm. Ensure that the transverse centerline of the upper crossbeam coincides with the centerline of the ear beam holes on both sides of the machine arm through the observation hole on the upper crossbeam, and that the longitudinal centerline of the upper crossbeam coincides with the longitudinal centerline of the machine arm. S7: Install the pin on the pin support, and install the machined pin sleeve on the front end of the pin. The size of the pin sleeve is compatible with the diameter of the ear beam hole on the machine arm. S8: Push the pin so that the pin pushes the pin sleeve into the ear beam hole on the arm; S9: Spot weld the fixing pin sleeves on both sides of the arm simultaneously; S10: Repeat steps S6-S9 above to weld the remaining pin sleeves in sequence.

2. The method for pre-positioning the pin sleeve according to claim 1, characterized in that, The sum of the height B and the spacing C is equal to the vertical distance between the bottom surface of the upper crossbeam and the center of the upper ear beam hole of the machine arm.

3. The method for pre-positioning the pin sleeve according to claim 1, characterized in that, In step S7, the pin and the pin sleeve are connected by a transition fit.

4. A pin sleeve pre-positioning device for implementing the pin sleeve pre-positioning method of claim 1, characterized in that, The system includes an upper crossbeam, with a pair of pin supports symmetrically installed at the bottom of both ends of the upper crossbeam. The pin holes on the pair of pin supports are arranged coaxially. A pair of upper pads are symmetrically arranged at the center of the bottom of the upper crossbeam. Pins are inserted into the pair of pin supports to push the pin sleeves into the ear beam holes of the machine arm.

5. The pin sleeve pre-positioning device according to claim 4, characterized in that, A through observation hole is provided at the center of the top of the upper crossbeam.

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