A gear box driven gear assembly

Abstract

The utility model relates to a gear box driven gear assembling device belongs to the technical field of equipment, to solve the mode of manual handling assembly driven gear in prior art, there is big difficulty in part positioning centering, slow installation, low installation accuracy and low assembly safety problem. The present application includes mounting bracket, axle positioning cylinder and transfer assembly, axle positioning cylinder fixed mounting is in mounting bracket, be equipped with gear box installation site on axle positioning cylinder to be used for installing gear box, axle positioning cylinder and the axle mounting hole position of gear box correspond, transfer assembly includes transfer table, transfer table sliding installation is in mounting bracket, and transfer table slides along mounting bracket towards axle positioning cylinder sliding movement. The gear box driven gear assembling device of the present application takes axle positioning cylinder as part positioning object, so that part positioning accuracy is high, convenient to install, installation accuracy is high, and high temperature driven gear does not need manual handling, and assembly safety is high.

Description

Technical Field

[0001] This utility model relates to a gearbox driven gear assembly device, belonging to the technical field of gear assembly equipment. Background Technology

[0002] With the rapid development of high-speed rail, more and more EMU trains are entering their maintenance period. The technical experience in the domestic manufacturing and maintenance of EMU trains is becoming increasingly abundant. Through the accumulation of operational data from various types of domestically produced EMU train bogie gearboxes, it has been found that hot-fitting assembly is more stable and reliable than cold-pressing assembly in the assembly and fitting process between the bogie gearbox and the axle. Therefore, an increasing number of EMU trains are switching to hot-fitting assembly for their bogie gearboxes and axles.

[0003] In existing technologies, for integral EMU gearboxes, the driven gear is installed inside the gearbox, while the axle is installed through the gearbox, with the driven gear fitted onto the axle. Therefore, during the assembly of the gearbox, axle, and driven gear, the heated driven gear must first be installed into the gearbox housing, and then the axle must be quickly inserted into the gearbox housing and driven gear. Current assembly processes often involve manual handling before component assembly. First, the heated driven gear is aligned with the gearbox, and then the axle is inserted. However, this assembly process is slow due to the heavy weight of the components, requiring precise alignment during installation. This often results in slow installation speed, causing the driven gear temperature to drop, affecting assembly accuracy. Furthermore, handling and assembling the heated driven gear poses a risk of personal injury. Therefore, a gearbox driven gear assembly device is needed to address the problems of difficulty in component alignment, slow installation speed, low installation accuracy, and low assembly safety associated with the existing manual handling method. Utility Model Content

[0004] The purpose of this utility model is to provide a gearbox driven gear assembly device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gearbox driven gear assembly device, comprising a mounting frame, an axle positioning cylinder, and a transfer assembly, wherein the axle positioning cylinder is fixedly mounted on the mounting frame; the axle positioning cylinder is provided with a gearbox mounting position for mounting the gearbox, and the axle positioning cylinder corresponds to the axle mounting hole of the gearbox; the transfer assembly includes a transfer platform, which is slidably mounted on the mounting frame, and the transfer platform slides along the mounting frame toward the axle positioning cylinder.

[0006] Specifically, the mounting frame includes a grounding plate, a main metal bracket, and a transfer bracket; the main metal bracket is vertically fixed to the grounding plate; the axle positioning cylinder is fixedly installed on the main metal bracket, and a transfer bracket is fixedly installed on the frame corresponding to the axle positioning cylinder on the main metal bracket, and the transfer assembly is installed on the transfer bracket.

[0007] Specifically, the main metal support is a box structure with openings on both sides and a hollow interior; the axle positioning cylinder is vertically fixed on the upper opening side of the main metal support, and its cylinder is located inside the hollow box of the main metal support; the transfer bracket is an L-shaped mounting bracket, and reinforcing ribs are installed between the two sides of its L-shaped frame; the L-shaped mounting bracket is fixedly connected to the main metal support through one side of the L-shaped frame, and the other side of the frame is set perpendicular to the axle positioning cylinder in the horizontal direction to form the installation end of the transfer component.

[0008] Specifically, the axle positioning cylinder is a hollow cylinder structure with openings on both sides. Several mounting holes are provided along the outer side of the cylinder near the upper opening. Threaded holes are provided at the corresponding positions of the main metal bracket and the mounting holes. When the axle positioning cylinder is installed on the main metal bracket, the mounting holes and threaded holes correspond one-to-one.

[0009] Specifically, the shape of the hollow cavity inside the axle positioning cylinder is adapted to the shape of the axle; the outer cylinder of the axle positioning cylinder is provided with a stepped first boss and a second boss; the shape of the first boss is adapted to the gearbox axle mounting hole to form a gearbox positioning part; the second boss is adjacent to the upper opening side of the axle positioning cylinder to form a transfer table positioning part.

[0010] Specifically, the upper opening of the axle positioning cylinder is provided with an installation groove for installing the driven gear; the internal hollow cavity of the axle positioning cylinder is enclosed inward near the lower opening to form a stepped limiting hole, and the axle abuts against the limiting hole; the distance between the stepped limiting hole and the installation groove is adapted to the installation position of the driven gear on the axle.

[0011] Specifically, a guide rail is fixedly installed on the transfer bracket towards the axle positioning cylinder, and a slider is slidably installed on the guide rail; the transfer table is fixedly installed on the slider, and the platform of the transfer table extends outward towards the axle positioning cylinder to form a docking end; the docking end is consistent with the radial height dimension of the second boss, and when the transfer table slides towards the axle positioning cylinder for docking, the docking end is in contact with the second boss and abuts against the axle positioning cylinder, and the platform surface of the transfer table is consistent with the upper opening of the axle positioning cylinder.

[0012] Specifically, the shape of the docking end of the transfer table is adapted to the shape of the axle positioning cylinder; two limiting strips are movably installed on both sides of the transfer table, forming a slide for the driven gear to slide in a straight line, and the slide is recessed inward with the center of the slide to form a partitioned slide structure with high sides and low middle; the driven gear is slidably placed in the high area on both sides of the slide.

[0013] Specifically, an oil receiving groove is provided at the position corresponding to the axle positioning cylinder on the ground plate; a buffer is provided on the inner side of the limiting hole of the axle positioning cylinder.

[0014] Specifically, a pad is detachably installed on the main metal support frame corresponding to the L-shaped mounting bracket to adjust the installation height of the L-shaped mounting bracket; a transfer handle is provided on the outside of the transfer table.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This application utilizes an axle positioning cylinder mounted on a mounting bracket for inserting an axle. The axle positioning cylinder has a gearbox mounting position for mounting the gearbox, and a transfer stage is slidably mounted on the mounting bracket for transferring the driven gear. By using the axle positioning cylinder as the main mounting component, during assembly, the gearbox is first positioned and installed with the axle positioning cylinder via the gearbox mounting position. Then, the heated driven gear is placed on the transfer stage and moved towards the axle positioning cylinder, aligning the driven gear with the cylinder. Finally, the axle is inserted into the axle positioning cylinder to complete the alignment and assembly of the axle, gearbox, and driven gear. This application uses the axle positioning cylinder as the component positioning object, resulting in high component positioning accuracy, convenient installation, high installation precision, and eliminating the need for manual handling of the hot driven gear, thus ensuring high assembly safety.

[0016] 2. Building upon the foregoing, to reduce the assembly difficulty of the axle positioning cylinder, gearbox, and driven gear, thereby improving installation efficiency, the mounting frame of this application includes a ground plate, a main metal bracket, and a transfer bracket. The main metal bracket is vertically mounted on the ground plate, serving as a mounting carrier for the main components of the device, thus improving assembly stability. The main metal bracket of this application is a box structure with openings on both sides and a hollow interior, while the axle positioning cylinder is a cylinder structure with openings on both sides and a hollow interior. By vertically fixing the axle positioning cylinder inside the box of the main metal bracket, the axle can be vertically inserted into the axle positioning cylinder during axle installation, reducing assembly difficulty. Simultaneously, the transfer bracket of this application is an L-shaped mounting bracket. The L-shaped bracket is mounted on the outside of the main metal bracket, with the other side of the L-shaped bracket perpendicular to the main metal bracket, i.e., horizontally positioned, forming the mounting end of the transfer table. This allows for easy and safe operation by simply sliding the transfer table horizontally when transferring the driven gear.

[0017] 3. Based on the foregoing, in order to improve the installation and positioning accuracy of the axle positioning cylinder, gearbox, and driven gear, and thus improve assembly accuracy, the outer cylinder of the axle positioning cylinder of this application is provided with a stepped first boss and a second boss; the shape of the first boss is adapted to the gearbox axle mounting hole to form a gearbox positioning part; the second boss is adjacent to the upper opening side of the axle positioning cylinder to form a transfer table positioning part. The gearbox is positioned using a first boss as the positioning part, and the transfer table is positioned using a second boss as the positioning part. The transfer table extends outward toward the axle positioning cylinder to form a docking end. The docking end has the same radial height dimension as the second boss. When the transfer table slides toward the axle positioning cylinder, the docking end is opposite to the second boss and abuts against the axle positioning cylinder. The table surface of the transfer table is consistent with the upper opening of the axle positioning cylinder. This allows for rapid positioning and installation of the gearbox and axle during assembly. When transferring the driven gear, the transfer table and axle positioning cylinder are quickly positioned and transferred, improving the assembly speed and preventing the driven gear from cooling down due to slow transfer speed, which would affect the assembly accuracy.

[0018] 4. Building upon the foregoing, to improve the assembly accuracy of the mounting position between the axle and the driven gear, the axle positioning cylinder of this application has an mounting groove on the inner side of its upper opening for mounting the driven gear. The hollow cavity inside the axle positioning cylinder, near the lower opening, encloses inward to form a stepped limiting hole, where the axle abuts. The distance between the stepped limiting hole and the mounting groove matches the mounting position of the driven gear on the axle. This allows the driven gear to be directly and quickly positioned and installed in the mounting groove when transferred to the axle positioning cylinder via a transfer table. When the axle is inserted, to ensure the accuracy of the mounting position between the driven gear and the axle, the depth of the axle insertion into the axle positioning cylinder is controlled to guarantee the assembly accuracy. During assembly, after the axle is inserted, it abuts at the limiting hole; the position between the driven gear and the axle at this point is the assembly position. This application, by setting a limiting hole, enables rapid axle insertion during assembly, achieving high centering accuracy, fast installation speed, and high assembly precision.

[0019] 5. Building upon the foregoing, to improve the product adaptability of the assembly device of this application, given the different axle and driven gear configurations of gearboxes of various specifications, the hollow cavity of the axle positioning cylinder is shaped to match the axle shape. Several mounting holes are provided along the outer side of the cylinder near the upper opening. Threaded holes are provided on the main metal bracket at positions corresponding to these mounting holes. When the axle positioning cylinder is installed on the main metal bracket, the mounting holes and threaded holes correspond one-to-one. Two limiting strips are movably mounted on both sides of the transfer table, forming a slide rail for the driven gear to slide in a straight line. The slide rail is recessed inward from its center, creating a recessed slide rail structure that is high on both sides and low in the middle. Simultaneously, a removable pad is provided on the main metal bracket corresponding to the L-shaped mounting bracket for adjusting the installation height of the L-shaped mounting bracket. This allows for product adaptation by simply replacing the matching axle positioning cylinder when assembling driven gears for gearboxes of different specifications, without replacing the entire assembly device, thus improving product applicability and reducing production costs. The specifications of the axle positioning cylinder change with the dimensions of the driven gear. This also alters the accuracy of the installation position between the axle positioning cylinder, the main metal bracket, and the transfer table. To address these changes, this application employs a split-type axle positioning cylinder and main metal bracket design. The shape of the hollow cavity inside the axle positioning cylinder matches the shape of the axle, while the mounting holes on the outer side of the cylinder remain unchanged. Therefore, the installation positions of the axle positioning cylinder and the main metal bracket remain constant. However, the dimensions of the axle positioning cylinder may alter the installation height of the second boss. Therefore, a shim is used to adjust the L-shaped mounting bracket, i.e., the installation height of the transfer table, for adaptation. When the dimensions of the driven gear change, the distance between the limiting strips on both sides of the transfer table can be adjusted for compatibility. This application offers high product adaptability, convenient adjustment, and low production costs during product adaptation.

[0020] 6. Based on the foregoing, since the driven gear and axle require cooling after assembly to achieve an interference fit, oil needs to be injected during the cooling process. To prevent oil from dripping onto the assembly floor and causing environmental pollution and slipping, this application provides an oil collection groove at the position corresponding to the axle positioning cylinder on the grounding plate to collect dripping oil, thereby improving the cleanliness of the assembly environment and assembly safety. Additionally, the transfer table in this application is equipped with a transfer handle to facilitate precise operation of the transfer table's travel and to prevent burns from the driven gear.

[0021] 7. Based on the foregoing, the transfer table of this application is equipped with a driven gear slide rail to improve the sliding stability of the driven gear. Since the driven gear slides along the slide rail, in order to reduce the wear of the driven gear during the sliding process, the slide rail needs a high surface smoothness, which will increase the manufacturing cost of the transfer table. This application, by setting a partitioned slide rail structure with high sides and low center, allows the driven gear to slide in the slide rail area with high sides, which can reduce the slide rail area used for sliding, thereby reducing manufacturing costs. In addition, the partitioned slide rail structure can also reduce the contact area between the driven gear and the slide rail, thereby reducing friction, wear, and the workload of personnel transfer. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the gearbox driven gear assembly device in this embodiment (the transfer table and the axle positioning cylinder are not connected). Figure 2 This is a top view of the gearbox driven gear assembly device in this embodiment (the transfer table and the axle positioning cylinder are not connected). Figure 3 This is a schematic diagram of the gearbox driven gear assembly device in this embodiment (the transfer table and the axle positioning cylinder are already connected). Figure 4 This is a top view of the gearbox driven gear assembly device in this embodiment (the transfer table and the axle positioning cylinder are already connected). Detailed Implementation

[0023] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0024] Please see Figures 1-4 This embodiment discloses a gearbox driven gear assembly device, including a mounting frame, an axle positioning cylinder, and a transfer assembly. The axle positioning cylinder 3 is fixedly mounted on the mounting frame. The axle positioning cylinder is provided with a gearbox mounting position for mounting a gearbox (not shown), and the axle positioning cylinder corresponds to the axle mounting hole of the gearbox. The transfer assembly includes a transfer table 8, which is slidably mounted on the mounting frame and slides along the mounting frame toward the axle positioning cylinder.

[0025] The mounting frame in this embodiment includes a grounding plate 1, a main metal bracket 2, and a transfer bracket 4; the main metal bracket 2 is vertically fixed to the grounding plate 1. The main metal bracket 2 in this embodiment is a box structure with openings on both sides and a hollow interior; the axle positioning cylinder 3 is vertically fixed to the upper opening side of the main metal bracket 2, and its cylinder body is located within the hollow box of the main metal bracket; the transfer bracket 4 is an L-shaped mounting frame, and reinforcing ribs are installed between the two sides of its L-shaped frame; the L-shaped mounting frame is fixedly connected to the main metal bracket via one side of the L-shaped frame, and the other side of the frame is set horizontally perpendicular to the axle positioning cylinder to form the mounting end of the transfer assembly. A pad 5 is detachably installed on the frame corresponding to the L-shaped mounting frame on the main metal bracket 2 for adjusting the installation height of the L-shaped mounting frame. Additionally, an oil receiving groove 10 is provided on the grounding plate corresponding to the axle positioning cylinder in this embodiment.

[0026] Furthermore, in this embodiment, the axle positioning cylinder 3 is a cylindrical structure with openings on both sides and a hollow interior. Eight mounting holes are provided along the outer side of the cylinder near the upper opening side. Threaded holes are provided at positions corresponding to the mounting holes on the main metal bracket. When the axle positioning cylinder is installed on the main metal bracket, the mounting holes and threaded holes correspond one-to-one.

[0027] In this embodiment, the shape of the internal hollow cavity of the axle positioning cylinder 3 is adapted to the shape of the axle; the outer cylinder of the axle positioning cylinder is provided with a stepped first protrusion 30 and a second protrusion 31; the shape of the first protrusion is adapted to the gearbox axle mounting hole to form a gearbox positioning part; the second protrusion 31 is adjacent to the upper opening side of the axle positioning cylinder to form a transfer table positioning part. In addition, the inner side of the upper opening of the axle positioning cylinder in this embodiment is provided with a mounting groove 32 for mounting a driven gear (not shown); the internal hollow cavity of the axle positioning cylinder surrounds inward near the lower opening to form a stepped limiting hole 33, the axle abuts against the limiting hole, and the inner side of the limiting hole of the axle positioning cylinder is provided with a nylon sleeve 34 to prevent the axle from hitting the axle positioning cylinder and causing damage to the axle during insertion. The distance between the stepped limiting hole and the mounting groove is adapted to the mounting position of the driven gear on the axle.

[0028] In this embodiment, two parallel guide rails 6 are fixedly installed on the transfer bracket 4 towards the axle positioning cylinder, and four sliders 9 are slidably installed on the two guide rails. The transfer platform 8 is fixedly installed on the sliders 9, and the platform body of the transfer platform extends outward towards the axle positioning cylinder to form a docking end. The radial height dimension of the docking end is consistent with that of the second boss 31. When the transfer platform slides towards the axle positioning cylinder for docking, the docking end is opposite to the second boss and abuts against the axle positioning cylinder. The platform surface of the transfer platform is consistent with the upper opening of the axle positioning cylinder. In addition, the docking end of the transfer platform 8 in this embodiment has an arc-shaped structure to adapt to the cylinder body of the axle positioning cylinder. Two limiting strips 80 are movably installed on both sides of the transfer platform, forming a slide rail 81 for the driven gear to slide in a straight line. The slide rail is recessed inward from the center of the slide rail to form a partitioned slide rail structure that is high on both sides and low in the middle. The driven gear is slidably placed in the high area on both sides of the slide rail. In addition, a transfer handle 7 is provided on the outside of the transfer platform 8 in this embodiment.

[0029] Working Principle: Before using the gearbox driven gear assembly device in this embodiment, the operator first confirms the specifications and dimensions of the axle and driven gear according to the gearbox model to select a suitable axle positioning cylinder. Then, the components are assembled. In this embodiment, the plate corresponding to the main metal bracket has a positioning groove, and the frame corresponding to the positioning groove has a positioning ring. When installing the main metal bracket, the main metal bracket is lifted and moved to the positioning groove using a lifting device. Then, the positioning ring is installed in the positioning groove to complete the positioning. Next, the bolts are tightened to fix the main metal bracket to the grounding plate. Then, the transfer bracket and axle positioning cylinder are lifted and installed separately. It should be noted that when installing the transfer bracket, a pad is installed at the bottom of the transfer bracket according to the size of the axle positioning cylinder to adjust the installation height of the transfer bracket. Finally, the transfer assembly is installed on the transfer bracket to complete the component assembly.

[0030] In use, first install the gearbox onto the axle positioning cylinder. Then, use lifting equipment to lift the axle and move it to the upper side of the axle positioning cylinder for alignment. Next, use lifting equipment to lift the preheated driven gear and move it onto the transfer platform. Then, push the transfer handle to slide the transfer platform toward the axle positioning cylinder until the mating end of the transfer platform aligns with the second boss, and continue sliding along the second boss until it stops at the axle positioning cylinder. Next, manually push the driven gear to slide and install it into the mounting slot. Then, reset the transfer platform and quickly insert the axle into the axle positioning cylinder until the axle stops at the limit hole. Rotate the driven gear to confirm that the assembly is in place. Then, keep the driven gear and axle on the device to cool. After cooling to a certain temperature, perform oil injection and alignment, and further cooling to complete the heat-shrink assembly of the integral gearbox and axle. Oil overflowing during the oil injection and alignment process will flow to the oil collection groove at the grounding plate.

[0031] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. For those skilled in the art, after learning the contents of the present invention, several equivalent changes and substitutions can be made without departing from the principle of the present invention. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A gearbox driven gear assembly device, comprising a mounting bracket, an axle positioning cylinder, and a transfer assembly, characterized in that: The axle positioning cylinder is fixedly installed on the mounting frame; the axle positioning cylinder is provided with a gearbox mounting position for installing a gearbox, and the axle positioning cylinder corresponds to the axle mounting hole of the gearbox; the transfer assembly includes a transfer table, which is slidably installed on the mounting frame, and the transfer table slides along the mounting frame toward the axle positioning cylinder.

2. The gearbox driven gear assembly device according to claim 1, characterized in that: The mounting frame includes a grounding plate, a main metal bracket, and a transfer bracket; the main metal bracket is vertically fixed to the grounding plate; the axle positioning cylinder is fixedly installed on the main metal bracket, and a transfer bracket is fixedly installed on the frame corresponding to the axle positioning cylinder on the main metal bracket, and the transfer assembly is installed on the transfer bracket.

3. The gearbox driven gear assembly device according to claim 2, characterized in that: The main metal support is a box structure with openings on both sides and a hollow interior; the axle positioning cylinder is vertically fixed to the upper opening side of the main metal support, and its cylinder is located inside the hollow box of the main metal support; the transfer bracket is an L-shaped mounting bracket, and reinforcing ribs are installed between the two sides of its L-shaped frame; the L-shaped mounting bracket is fixedly connected to the main metal support through one side of the L-shaped frame, and the other side of the frame is set perpendicular to the axle positioning cylinder in the horizontal direction to form the mounting end of the transfer assembly.

4. A gearbox driven gear assembly device according to claim 2, characterized in that: The axle positioning cylinder is a hollow cylinder structure with openings on both sides. Several mounting holes are provided along the outer side of the cylinder near the upper opening. The main metal bracket has threaded holes at positions corresponding to the mounting holes. When the axle positioning cylinder is installed on the main metal bracket, the mounting holes and threaded holes correspond one-to-one.

5. A gearbox driven gear assembly device according to claim 4, characterized in that: The shape of the hollow cavity inside the axle positioning cylinder is adapted to the shape of the axle; the outer cylinder of the axle positioning cylinder is provided with a stepped first protrusion and a second protrusion; the shape of the first protrusion is adapted to the gearbox axle mounting hole to form a gearbox positioning part; the second protrusion is adjacent to the upper opening side of the axle positioning cylinder to form a transfer table positioning part.

6. A gearbox driven gear assembly device according to claim 5, characterized in that: The upper opening of the axle positioning cylinder is provided with an installation groove for installing the driven gear; the internal hollow cavity of the axle positioning cylinder surrounds inward near the lower opening to form a stepped limiting hole, and the axle abuts against the limiting hole; the distance between the stepped limiting hole and the installation groove is adapted to the installation position of the driven gear on the axle.

7. A gearbox driven gear assembly device according to claim 5, characterized in that: A guide rail is fixedly installed on the transfer bracket toward the axle positioning cylinder, and a slider is slidably installed on the guide rail; the transfer platform is fixedly installed on the slider, and the platform of the transfer platform extends outward toward the axle positioning cylinder to form a docking end; the docking end is consistent with the radial height dimension of the second boss, and when the transfer platform slides toward the axle positioning cylinder, the docking end is opposite to the second boss and abuts against the axle positioning cylinder, and the platform surface of the transfer platform is consistent with the upper opening of the axle positioning cylinder.

8. A gearbox driven gear assembly device according to claim 7, characterized in that: The shape of the docking end of the transfer platform is adapted to the shape of the axle positioning cylinder; two limiting strips are movably installed on both sides of the transfer platform, forming a slide for the driven gear to slide in a straight line, and the slide is recessed inward with the center of the slide to form a partitioned slide structure with high sides and low middle; the driven gear is slidably placed in the high area on both sides of the slide.

9. A gearbox driven gear assembly device according to claim 6, characterized in that: An oil receiving groove is provided at the position corresponding to the axle positioning cylinder on the ground plate; a buffer is provided on the inner side of the limiting hole of the axle positioning cylinder.

10. A gearbox driven gear assembly device according to claim 3, characterized in that: A pad is detachably mounted on the main metal support corresponding to the L-shaped mounting bracket to adjust the installation height of the L-shaped mounting bracket; a transfer handle is provided on the outside of the transfer table.

Images