Rail transit axle support tool

Abstract

The utility model belongs to axle auxiliary support frock technical field discloses a rail transit axle support frock, including base, the top of base is opened first strip slot, is arranged with first motor and sliding block in first strip type slot, is driven trolley with first screw drive between first motor and sliding block, and the inboard surface of driven trolley is fixed with center axle and three fixed columns, the top of base is opened second strip slot, and the middle part of second strip slot is equipped with second motor, and the first output of second motor is connected with second lead screw, and second lead screw is connected with first support block threadedly, and the second output of second motor is connected with third lead screw, and third lead screw is connected with second support block threadedly, and the V type support structure is formed between first support block and second support block, the utility model cooperates with V type support structure through center axle, realizes the one -time positioning and installation of rail transit axle and bearing, need not help with the crane axle hoist, and work efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of axle auxiliary support tooling, specifically relating to a geared axle support tooling for high-speed trains. Background Technology

[0002] The gearbox of a high-speed train is a core component of the train's bogie. It uses gear meshing to reduce motor speed and increase torque to achieve train movement. High-speed train gearboxes require major overhaul every 2.9 million kilometers. The output stage gear of the gearbox is interference-fitted onto the axle, transmitting the speed and torque of the pinion shaft to the wheels, which are also interference-fitted at both ends of the axle. Tapered roller bearings are installed on both sides of the gear on the toothed drive shaft to achieve circumferential movement of the axle.

[0003] Traditional axle installation and support fixtures have two support points: a gear and a wheel seat with a toothed drive axle. When installing a bearing, the inner ring of the bearing must first be fitted onto the axle. Then, using a crane, a lifting rope is attached to the outermost end of the axle, lifting the axle away from the wheel seat support point. The bearing is then moved to the installation position, and the installation between the bearing and the axle is completed. This process is complex and involves many steps. Furthermore, the number of cranes available during hoisting determines the number of axles that can be installed simultaneously. A disassembly and assembly workshop often only has one crane, thus only one bearing can be installed at a time, resulting in low efficiency and difficulty in meeting the requirement of simultaneous installation of multiple axles. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model provides a rail transit vehicle axle support fixture, which achieves the axle support function by alternating between a V-shaped seat and a central shaft. When installing bearings, it is not necessary to use a crane to lift the axle multiple times, thus improving work efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a rail transit vehicle axle support fixture, including a base, a first strip groove on the top of the base, the first strip groove being arranged along the length of the base and located in the middle of the base, a first motor fixed to one end of the first strip groove, and a slider slidably connected to the other end of the first strip groove, the slider having an inverted T-shaped cross-section, the bottom of the slider being locked within the first strip groove and not swinging arbitrarily, the slider only reciprocating linearly within the first strip groove. A drive trolley is fixed to the top of the slider, and three fixed columns are fixed to the inner side of the drive trolley, the three fixed columns being arranged in parallel and forming an equilateral triangle support structure; a central insert shaft is fixed to the middle of the drive trolley, the central insert shaft being arranged parallel to the base, the first motor driving the slider to reciprocate within the first strip groove, so as to move the drive trolley closer to or away from the first motor.

[0006] The output end of the first motor is connected to one end of the first lead screw. The first lead screw is arranged parallel to the base. The first lead screw and the slider are connected by threads. The first lead screw and the slider form a ball screw structure or a lead screw and nut structure. The first motor drives the first lead screw to rotate, which is converted into the linear reciprocating motion of the slider along the first strip groove.

[0007] The base has a second slot at its top, which is perpendicular to the first slot and located near the first motor. A second motor is positioned in the middle of the second slot, with its first output connected to a second lead screw. The second lead screw is parallel to the base and threadedly connected to a first support block, forming a ball screw structure or a lead screw and nut structure. The second output of the second motor is connected to a third lead screw, which is parallel to the base and threadedly connected to a second support block, also forming a ball screw structure or a lead screw and nut structure. The second and third lead screws rotate synchronously in opposite directions. The second motor drives the first support block, which reciprocates linearly along the second slot, with the first and second support blocks moving in opposite directions.

[0008] The first support block has a first inclined surface, and the second support block has a second inclined surface. The first inclined surface and the second inclined surface are arranged opposite to each other, forming a V-shaped support structure between the first inclined surface and the second inclined surface.

[0009] To reduce the weight of the drive trolley, the drive trolley has a triangular structure, with the central axle located in the middle of the drive trolley, and three fixed columns arranged at equal angular intervals around the center of the central axle.

[0010] The central axis of the first lead screw and the central axis of the central insert shaft are placed in the same vertical plane, thereby ensuring the smooth operation of the central insert shaft. The inclination angles of the first inclined plane and the second inclined plane are the same.

[0011] The center of the fixing column is made of steel, and the outer surface of the fixing column is covered with a nylon layer to prevent damage to the inner ring of the bearing.

[0012] The center of the central insert shaft is made of steel, and the outer surface of the central insert shaft is covered with a nylon layer to prevent damage to the inner hole of the axle.

[0013] A nylon layer is arranged on the outer side of the first inclined surface and a nylon layer is arranged on the outer side of the second inclined surface to avoid damaging the outer side of the axle.

[0014] Compared with the prior art, the specific beneficial effects of this utility model are reflected in the following aspects: I. This utility model achieves one-time positioning and installation of rail transit vehicle axles and bearings by using a central insert shaft in conjunction with a V-shaped support structure. During the bearing installation process, there is no need to use a crane to lift the axle, avoiding multiple lifting and moving of the axle. The entire axle installation process is simple and highly efficient.

[0015] 2. Nylon layers are arranged on the central insert shaft, fixed column, first inclined surface, and second inclined surface of this utility model, which can avoid damage to the axle and bearing during the axle support and movement process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the working state of this utility model.

[0018] Figure 3 This is a front view of the present invention in its working state.

[0019] Figure 4 This is a side view of the present invention in its working state.

[0020] Figure 5 This is a top view of the present invention in its working state.

[0021] In the diagram, 1 is the base, 2 is the first slot, 3 is the first motor, 4 is the first lead screw, 5 is the second slot, 6 is the slider, 7 is the drive trolley, 8 is the fixed column, 9 is the central insert shaft, 10 is the second motor, 11 is the second lead screw, 12 is the third lead screw, 13 is the first support block, 14 is the second support block, 15 is the first inclined plane, 16 is the second inclined plane, 17 is the bearing, and 18 is the large gear. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] like Figure 1-5 As shown, a rail transit vehicle axle support fixture includes a base 1, which is a steel platform, so that the support seat of the entire fixture is fixed to the ground by anchor bolts.

[0024] The top of the base 1 has a first strip groove 2, which is arranged along the length of the base 1 and is located in the middle of the base 1. One end of the first strip groove 2 is fixed with a first motor 3, and the other end of the first strip groove 2 is slidably connected with a slider 6. The slider 6 has an inverted T-shaped cross section. The bottom of the slider 6 is stuck in the first strip groove 2 and will not swing randomly. The slider 6 only slides back and forth in a straight line within the first strip groove 2.

[0025] The top of the slider 6 is fixed with a drive trolley 7. Three fixed posts 8 are fixed on the inner side of the drive trolley 7. The three fixed posts 8 are arranged in parallel and form an equilateral triangle support structure. A central insert shaft 9 is fixed in the middle of the drive trolley 7. The central insert shaft 9 is arranged parallel to the base 1. The first motor 3 drives the slider 6 to reciprocate in the first strip groove 2 so as to drive the trolley 7 to move closer to or away from the first motor 3.

[0026] The output end of the first motor 3 is connected to one end of the first lead screw 4. The first lead screw 4 is arranged parallel to the base 1. The first lead screw 4 is threadedly connected to the slider 6. The first lead screw 4 and the slider 6 form a ball screw structure or a lead screw and nut structure. The first motor 3 drives the first lead screw 4 to rotate so as to convert the slider 6 into linear reciprocating motion along the first strip groove 2.

[0027] The top of the base 1 has a second slot 5, which is perpendicular to the first slot 2 and located close to the first motor 3. A second motor 10 is located in the middle of the second slot 5. The first output end of the second motor 10 is connected to a second lead screw 11, which is parallel to the base 1. The second lead screw 11 is threadedly connected to a first support block 13, which is slidably connected within the second slot 5. The first support block 13 has an inverted T-shaped structure and will not detach from the second slot 5 during sliding. The second lead screw 11 and the first support block 13 form a ball screw structure or a lead screw and nut structure. The second output end of the second motor 10 is connected to a third lead screw. The first and second support blocks 11 and 12 are connected. The third lead screw 12 is arranged parallel to the base 1. The third lead screw 12 is threadedly connected to the second support block 14. The second support block 14 is slidably connected in the second strip groove 5. The second support block 14 has an inverted T-shaped structure. The second support block 14 will not detach from the second strip groove 5 during the sliding process. The third lead screw 12 and the second support block 14 form a ball screw structure or a lead screw and nut structure. The second lead screw 11 and the third lead screw 12 rotate synchronously. The rotation directions of the second lead screw 11 and the third lead screw 12 are opposite. The second motor 10 drives the first support block 13 and the second support block 14 to perform linear reciprocating motion along the second strip groove 5. The running directions of the first support block 13 and the second support block 14 are opposite.

[0028] The first support block 13 is provided with a first inclined surface 15, and the second support block 14 is provided with a second inclined surface 16. The first inclined surface 15 and the second inclined surface 16 are arranged opposite to each other, and a V-shaped support structure is formed between the first inclined surface 15 and the second inclined surface 16.

[0029] To reduce the weight of the drive trolley 7, the drive trolley 7 has a triangular structure, with the central insertion shaft 9 located in the middle of the drive trolley 7, and three fixed columns 8 arranged at equal angular intervals around the center of the central insertion shaft 9.

[0030] The central axis of the first lead screw 4 and the central axis of the central insert shaft 9 are placed in the same vertical plane, thereby ensuring the smooth operation of the central insert shaft 9. The first inclined surface 15 and the second inclined surface 16 have the same inclination angle.

[0031] The fixing post 8 has an outer nylon structure, and the center of the fixing post 8 is made of steel. The outer surface of the fixing post 8 is covered with a nylon layer to avoid damaging the inner ring of the bearing 17.

[0032] The center insert shaft 9 has an outer nylon structure, while the center of the central shaft is made of steel. The outer surface of the center insert shaft 9 is covered with a nylon layer to prevent damage to the inner hole of the axle.

[0033] A nylon layer is arranged on the outer side of the first inclined surface 15 and the outer side of the second inclined surface 16 to avoid damaging the outer side of the axle.

[0034] The working process of this tooling is as follows: the second motor 10 is started, the second lead screw 11 and the third lead screw 12 rotate synchronously, the first support block 13 and the second support block 14 move synchronously towards the second motor 10 in a straight line. After the first support block 13 and the second support block 14 reach the designated position, a V-shaped support structure is formed between the first inclined surface 15 and the second inclined surface 16. First, one end of the axle is placed on the V-shaped support structure, the large gear 18 on the axle is placed on the nylon pad, the inner ring of the bearing 17 heated to a certain temperature is taken out, and the inner ring of the bearing 17 is suspended on the three fixed columns 8 of the drive trolley 7. The first motor 3 is started, and the trolley 7 is driven to run towards the axle until the central insert shaft 9 is inserted into the center hole of the axle, and the axle is firmly supported.

[0035] After the central insert shaft 9 moves to the designated position, the system automatically recognizes its position. The V-shaped support structure needs to detach from the axle. The second motor 10 starts, and the second lead screw 11 and the third lead screw 12 start synchronously. The first support block 13 and the second support block 14 move in opposite directions, detaching from the axle and moving to the designated position. With the joint support of the large gear 18 and the central insert shaft 9, the axle is supported and positioned. Subsequently, the bearing 17 is manually adjusted to the designated position along the axle to achieve an interference fit. After installation, the installed axle is removed, and the above steps are repeated to complete the next installation of the bearing 17.

[0036] In addition, by arranging multiple axle support fixtures in the workshop, multiple axles and bearings 17 can be installed simultaneously without increasing the number of overhead cranes in the workshop, making the operation convenient and efficient.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model shall be included within the scope of the present utility model.

Claims

1. A rail transit vehicle axle support fixture, characterized in that, Includes a base (1), the top of the base (1) has a first strip groove (2), the first strip groove (2) is arranged along the length direction of the base (1), one end of the first strip groove (2) is fixed with a first motor (3), the other end of the first strip groove (2) is slidably connected with a slider (6), the top of the slider (6) is fixed with a drive trolley (7), the inner side of the drive trolley (7) is fixed with three fixed columns (8), and the middle of the drive trolley (7) is fixed with a central insert shaft (9); The output end of the first motor (3) is connected to one end of the first lead screw (4). The first lead screw (4) is arranged parallel to the base (1). The first lead screw (4) is threadedly connected to the slider (6). The top of the base (1) has a second strip groove (5), which is perpendicular to the first strip groove (2). The second strip groove (5) is located close to the first motor (3). A second motor (10) is located in the middle of the second strip groove (5). The first output end of the second motor (10) is connected to a second lead screw (11). The second lead screw (11) is arranged parallel to the base (1). The second lead screw (11) is threadedly connected to the first support block (13). The first support block (13) slides... The second motor (10) is connected to the second output end of the second motor (10) in the second slot (5). The third screw (12) is arranged parallel to the base (1). The third screw (12) is threaded to the second support block (14). The second support block (14) is slidably connected in the second slot (5). The first support block (13) is provided with a first inclined surface (15), and the second support block (14) is provided with a second inclined surface (16). The first inclined surface (15) and the second inclined surface (16) are arranged opposite to each other.

2. The rail transit vehicle axle support fixture according to claim 1, characterized in that, The driving trolley (7) has a triangular structure, the central insertion shaft (9) is located in the middle of the driving trolley (7), and the three fixed columns (8) are arranged at equal angular intervals around the center of the central insertion shaft (9).

3. The rail transit vehicle axle support fixture according to claim 2, characterized in that, A V-shaped support structure is formed between the first inclined surface (15) and the second inclined surface (16).

4. The rail transit vehicle axle support fixture according to claim 3, characterized in that, The central axis of the first lead screw (4) and the central axis of the central insert shaft (9) are placed in the same vertical plane, and the first inclined plane (15) and the second inclined plane (16) have the same inclination angle.

5. The rail transit vehicle axle support fixture according to claim 4, characterized in that, The outer surface of the fixed column (8) is provided with a nylon layer, the outer surface of the central insert shaft (9) is provided with a nylon layer, the outer surface of the first inclined surface (15) is provided with a nylon layer, and the outer surface of the second inclined surface (16) is provided with a nylon layer.

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